Lan Ersi clutched his head with both hands.

It felt as though his consciousness were splitting apart.

The pain was unbearable.

He couldn't do anything.

He couldn't remember anything.

His head hung low as his eyes struggled between brown and blue. The handsome, emotionless face he normally wore was now twisted with agony.

At that moment, Dr. Ganlun finally looked up from his experiment and threw back his head with a triumphant laugh.

"Hahaha! As expected! The best experimental subject!"

"So powerful!"

"Even after being injected with Super Energy, it still hasn't completely died!"

"I have a feeling..."

"This is going to be my greatest masterpiece!"

He gazed at the experimental subject on the table with undisguised affection, as though admiring the most precious treasure in existence.

Then something occurred to him.

He muttered to himself,

"What about the other experimental subjects?"

"No. 5 is still alive..."

"No. 5 must also be an excellent specimen."

"And No. 2..."

"And all the others..."

He suddenly looked toward the projection.

"Have my experimental subjects been captured yet?"

"I can't wait to see where their limits truly are."

He expected to see his future specimens either captured...

Or desperately struggling.

Instead...

He saw a group of prisoners who had already reached Underground Floor One.

Underground Floor One?

They'd already made it there?!

Dr. Ganlun froze.

The next second, he screamed.

"AHHH! How did they get to Underground Floor One?!"

"My God! What happened?!"

"How is that possible?!"

"Ah! My experimental subjects!"

"My experimental subjects!"

"The one on Floor Six!"

"The ones on Five!"

"And Four, Three, Two!"

...

His shock was so overwhelming that his voice nearly shook the entire laboratory.

Lan Ersi frowned irritably.

His already unstable consciousness became even more chaotic beneath the doctor's shouting.

One eye had turned blue.

The other remained brown.

"Lan Ersi!"

"What happened?!"

Dr. Ganlun demanded while staring at the projection.

His anger and panic prevented him from noticing Lan Ersi's mismatched eyes.

Nor did he notice the expression of unbearable torment twisting across his face.

After a long pause, Lan Ersi finally spoke in a hoarse voice.

"They're very strong."

"They fought their way here."

"They released the experimental subjects from Floors Seven through Two."

"Some of the subjects attacked each other."

"Others fell into the disposal shaft..."

In other words...

He hadn't been able to save them.

Every experimental subject...

Was dead.

Dr. Ganlun stared in disbelief.

"They're all dead?!"

"Why didn't you tell me?"

"Why didn't you call me earlier?!"

Originally, he'd intended to conduct experiments while occasionally monitoring He Yu's group.

But once the experiment began...

Every ounce of his attention had been consumed by the subject before him.

He'd assumed nothing unexpected could happen.

Never had he imagined events would develop so completely beyond his expectations.

Lan Ersi's voice remained low and hoarse.

"Doctor."

"Weren't you planning to use those experimental subjects to temper them anyway?"

"The result is the same."

Dr. Ganlun paused.

He had indeed wanted to use the monsters to sharpen them.

But...

He hadn't wanted the monsters to die.

Still...

The damage had already been done.

Lan Ersi had reminded him of something.

Even without those experimental subjects...

He had new ones.

Dr. Ganlun stared at the figures in the projection.

His eyes once again filled with feverish excitement.

"You..."

"You are my new experimental subjects."

"As long as even one of you succeeds..."

"You'll surpass all those unfinished products."

Dragging over a chair, he sat down, staring intently at the projection.

"It doesn't matter."

"So what if you've escaped the underground?"

"All of you are my experimental subjects."

"Without my permission..."

"You'll never escape me."

He glanced at the time and smiled.

"It's almost twenty-three hundred."

"My experimental subjects..."

"Come to me."

Beside him...

Lan Ersi remained silent.

Underground Floor One.

This was the closest underground level to the surface.

Getting here had not been easy.

Everyone was covered in wounds.

Yet none of that could conceal the excitement burning in their eyes.

Just one more floor...

And they could escape.

They could finally leave this instance.

As if remembering something, Qu Wu suddenly frowned.

"The killer."

"Which one of us is the killer?"

If the killer were Wanrenzhan or Annie...

Escaping would mean promotion.

But if the killer remained among them...

The instant they successfully escaped...

Would also become the instant of elimination.

Death.

The design of this instance was truly vicious.

Duan Yuchen shook his head.

"Now isn't the time."

"We'll discuss it after reaching the surface."

His eyes remained fixed ahead.

This floor was different from every monster floor they'd encountered below.

Previously, the moment they entered a floor, they immediately fought monsters devoid of reason.

Using the stairwell as their defensive position...

They'd battled all the way up.

This floor still had a stairwell.

But...

There wasn't a single monster in sight.

The entire floor was enormous.

Wide open.

One glance revealed everything.

There was absolutely nothing.

More surprisingly...

Right in the center stood a massive spiral staircase.

It almost looked as though climbing those stairs would take them directly to the surface.

Yet...

The more unusual something appeared...

The more dangerous it usually was.

Thump.

Thump.

Thump.

Their hearts beat faster.

Standing back-to-back, everyone watched every direction, trying to locate whatever danger hid on this floor.

Time slowly passed.

Qiong took a deep breath.

"What do we do?"

"There doesn't seem to be any monster on this floor."

Eugene looked at the staircase.

Then toward He Yu.

"Go up?"

He Yu lowered his eyes toward the time.

Another two minutes had passed.

Only eighteen minutes remained before midnight.

His lowered bangs partially concealed his expression.

His voice remained as calm as ever.

"If we want to escape before twenty-three hundred..."

"The only option..."

"...is to go upstairs."

Duan Yuchen frowned.

"Something about your tone feels wrong."

He Yu looked up.

"I simply think..."

"Even after reaching the surface..."

"...escaping successfully will probably still be difficult."

Everyone's brows immediately knitted together.

Siya licked her dry lips.

Her own voice was equally dry.

"Once we're on the surface..."

"We only need to cut open the prison wall and get outside."

"We've already climbed from Underground Floor Nine to Floor One."

"We're only one step away."

"So why would we fail?"

He Yu's eyes were unfathomably deep.

He slowly shook his head.

"My calculations..."

"Place the probability of success far below the probability of failure."

"As for why..."

"I don't know yet."

Eugene clenched his teeth.

"Let's go up and see."

"We've come this far."

"We're finishing this."

Once on the surface...

They only needed to locate either the prison's perimeter or its main gate.

Cut through.

Escape.

In the Federation...

Such a brazen jailbreak would make them fugitives hunted forever.

But this was merely an instance.

No matter how much chaos they caused...

As long as they escaped...

They passed.

Once on the surface...

They also had to identify the killer.

Time was desperately short.

They couldn't waste even a second.

They had to move immediately.

Stopping beside the staircase, Eugene frowned.

"It looks normal..."

"But something feels strange."

"Do we use the stairs..."

"Or cut through the ceiling?"

"Ceiling," Qu Wu answered immediately.

"This staircase appearing here feels completely unnatural."

"And if it disappears after we climb..."

"We'll be in serious trouble."

Qiong shook her head.

"I recommend using the stairs."

She explained rapidly.

"Breaking through the ceiling takes time."

"And time is exactly what we don't have."

"Besides..."

"The floor above isn't another monster level."

"It's the prison itself."

The prison's main structure.

If they punched a hole through the prison floor...

Who knew what kind of consequences that would trigger?

Qiong supported taking the stairs.

Siya looked toward her.

"Do you have a plan?"

Qiong tugged lightly on the threads wrapped around her fingers.

"Eugene and I will go first."

"Ling Buchen stays behind."

"I'll connect everyone with my threads."

"If Eugene and I make it safely..."

"We'll pull the rest of you up."

"If something goes wrong..."

"You pull us back down."

It was all to guard against the staircase being a trap.

Duan Yuchen nodded.

"Sounds reasonable."

"Let's try."

He Yu didn't object.

Instead...

He walked over to the staircase and carefully examined it.

Why did it feel...

As though the staircase itself could move?

Qiong had already tied everyone together.

She and Eugene stepped forward first.

Eugene cautiously placed one foot on the stairs.

He immediately withdrew it.

Duan Yuchen became anxious.

"What happened?"

"Is something wrong?!"

Qiong's foot remained suspended in midair.

She didn't dare step down.

Eugene blinked.

A mischievous grin spread across his face.

"Nothing."

"I was just testing it."

Then he stepped fully onto the staircase.

Nothing happened.

Everyone: "..."

[Bullet Screen: "...You were really happy just pulling that prank, weren't you?"]

[Bullet Screen: "Seriously, Eugene actually found time to mess around here."]

[Bullet Screen: "Hahaha... he's kind of adorable."]

Everyone looked utterly speechless.

Qiong stepped onto the stairs as well.

Nothing happened.

The two of them immediately hurried upward.

In a place where unknown dangers lurked...

There was no point inching forward cautiously.

Once committed...

They had to move as quickly as possible.

Reaching the top...

Qiong and Eugene immediately surveyed the surroundings.

Standing back-to-back...

One watched behind.

The other watched ahead.

What greeted them...

Was a huge training room.

Completely empty.

Eugene muttered,

"Could it be we were overthinking—"

Qiong interrupted in a low voice.

"Call He Yu and the others up first."

She tugged lightly on the thread.

No warning came.

One after another...

The rest of the group arrived inside the surface-level training room.

Since it was nighttime...

Lights glowed outside.

The training room itself remained pitch black.

The windows...

Were the only thing proving they'd reached the surface.

If it were daytime...

Sunlight would undoubtedly pour through them.

Completely different from the underground levels that relied entirely on artificial lighting.

Everyone was still examining the room...

When Eugene suddenly stiffened.

His voice shot upward.

"Watch out!"

The instant he shouted...

He dashed sideways with lightning speed.

Bang!

Too late.

Eugene slammed directly into prison bars.

They...

Had been imprisoned again.

Underground Floor One truly contained nothing.

Because the staircase...

Wasn't merely a staircase.

Together with the training room above...

It formed one gigantic cage.

No wonder the staircase had seemed movable.

The enormous cage enclosed every one of them.

The moment they climbed the stairs...

It activated.

Eugene cursed furiously.

His chainsaw arm extended immediately.

He began sawing through the bars just as he had back on Underground Floor Seven.

The cage itself wasn't the real problem.

Time was.

Time...

Was everything.

The cage lifted from the floor.

It began moving toward one side of the training room.

There...

A transport elevator came into view.

It was clearly preparing to send them straight back underground.

Eugene and Ling Buchen attacked the same section simultaneously.

Their goal...

Break open the cage as fast as possible.

Holding Zhen Xing, Duan Yuchen looked toward the transport passage.

"So this..."

"Must be what Prisoner No. 4 mentioned."

"The route from the surface directly to Underground Floor Seven."

He Yu nodded.

"Exactly."

"The prison selects suitable prisoners..."

"And transports them directly underground from here."

"If anyone escapes..."

"There's only one staircase leading up from Underground Floor One."

"But once they emerge..."

"They're trapped again."

"And sent back down."

"The prison's layout..."

"...is remarkably well designed."

Qu Wu looked exasperated.

"...At a time like this..."

"You still have time to admire the prison?"

Without looking at him, He Yu adjusted his glasses.

"You misunderstood."

His expression remained perfectly calm.

"What I mean is..."

"The escape route..."

"From Underground Floor Nine to the surface..."

"...may have been wrong from the very beginning."

Siya frowned.

"You mean..."

"We should've used the transport elevator instead?"

Qu Wu shook his head.

"The elevator's controlled by the doctor and the warden."

"We could never have used it."

"We had no choice except forcing our way upward."

Then he relaxed slightly.

"This cage can't hold us."

"We're just wasting precious time."

Eugene's twin chainsaws.

Ling Buchen's divine artifact...

Li Zhan's zither.

Both attacked the same point.

Together...

They opened the cage much faster than before.

Yet...

Time continued slipping away.

Not only Qu Wu and Duan Yuchen...

Even Eugene and Ling Buchen themselves began growing anxious.

The cage reached the transport shaft...

"Quick!"

"Don't let it enter!"

Siya shouted urgently.

Qiong immediately raised both hands.

Threads shot outward.

One end wrapped around the cage.

The other attached itself to a nearby window.

Then another.

And another.

Countless threads secured themselves throughout the room, anchoring the cage from every possible direction.

Creak—

The cage's movement slowed.

The threads stretched to their limit.

Qiong gritted her teeth and held on.

Crash!

The furthest window shattered.

That thread snapped back.

The remaining threads continued resisting desperately.

Dragging the cage away from the transport shaft.

Climbing all the way from Underground Floor Nine had taken them hours.

If the elevator carried them back down...

Those hours would disappear in mere seconds.

"Faster!"

"Eugene!"

"Ling Buchen!"

Qiong shouted.

Neither answered.

Ling Buchen's face was deathly pale.

Eugene's chainsaw screamed as it cut faster and faster.

Crash!

Crash!

More windows exploded.

The cage teetered on the edge of the transport shaft.

Crack—

Finally...

The cage split open.

A huge section crashed onto the floor with a deafening boom.

Bang!

Bang!

Everyone jumped through the opening.

Because it was so small...

They could only escape one at a time.

Duan Yuchen and Zhen Xing were left for last.

The cage nearly entered the transport shaft with them still inside.

Fortunately...

Qiong's threads caught them in time and yanked them free.

Everyone exhaled.

Looking down at the time...

Ten minutes remained.

Such little time sent chills down everyone's spine.

Yet...

It still offered the faintest glimmer of hope.

Enough that none of them could bear to give up.

Before anyone could recover...

A sharp voice rang out outside.

"Who's in there?!"

Hurried footsteps followed.

Eugene immediately leaped through the broken window.

"Move!"

"Prison guards!"

There was no longer any time to fight.

Everyone climbed through the window.

Disappearing into the darkness.

Running with all their strength.

While sprinting, Eugene shouted,

"He Yu!"

"Which direction is the fastest?!"

He Yu answered immediately,

"I don't know the surface layout."

"At a time like this..."

"You should be asking yourself."

Eugene froze.

Then abruptly stopped.

Closing his eyes...

He began transmitting scanning signals in every direction.

He really had become stupid from all the escaping.

Now that they were on the surface...

No one was better suited than a Mechanical Planet contestant to locate walls and exits.

Eugene had simply become too accustomed to letting He Yu make every decision.

To following He Yu's lead.

[Bullet Screen: "Hahaha. When something happens—He Yu. When nothing happens—still He Yu."]

[Bullet Screen: "Honestly, He Yu really does make everyone feel secure."]

[Bullet Screen: "Eugene has fully embraced his role as every kind of machine imaginable. I'm dying."]

A few seconds later...

Standing on his flight equipment, Eugene grabbed Duan Yuchen and Siya before shooting toward the left.

Duan Yuchen still carried Zhen Xing.

Ling Buchen picked up He Yu and Qiong.

Qiong pulled Qu Wu along by the threads.

Behind them...

Prison guards gave frantic chase.

Ahead...

Eugene and Ling Buchen fled at full speed.

[Bullet Screen: "AHHH! They're really trying to escape tonight!"]

[Bullet Screen: "But who's the killer? They still don't know!"]

[Bullet Screen: "Was the killer yesterday's murderer? That's still the only real suspect... please don't be..."]

[Bullet Screen: "Even if they escape today... Wanrenzhan is finished, isn't he?"]

[Bullet Screen: "Yeah. Whether he's alive or dead doesn't matter anymore. Once they escape successfully, anyone left inside automatically fails and gets erased."]

Two minutes later...

They finally shook off the pursuers.

Arriving at one edge of the prison.

Massive electric fences.

Alarm systems.

Detection devices.

The prison's perimeter was heavily fortified.

Yet after climbing all the way from Underground Floor Nine...

None of it frightened them anymore.

Eugene landed.

Releasing Duan Yuchen and Siya, he looked at everyone.

"Eight minutes left."

"Now..."

"We need to determine who the killer is."

Silence.

The atmosphere instantly became heavy.

The killer.

They had to identify the killer.

Kill the killer.

Then...

Everyone else could leave alive.

Duan Yuchen raised one hand.

"First."

"I'm not the killer."

"I've been trying to figure out the killer this entire time."

"I suspect it's yesterday's murderer."

"That's the only clue we have."

His gaze moved toward Eugene...

Ling Buchen...

And Qiong.

His brows tightened.

Clearly...

He feared those three might simply abandon the rest of them.

There were eight people here.

Ignoring the unconscious Zhen Xing...

Seven remained.

Only three still possessed real combat power.

Any one of those three could kill the remaining four.

If those three joined forces...

Eliminating everyone else would drastically increase their own chances of survival.

Ling Buchen said nothing.

He simply stood quietly beside He Yu.

His actions alone...

Made his position perfectly clear.

Eugene looked deeply at him.

"You..."

"You've still got the courage to stand beside someone else at a time like this."

"If the killer isn't Annie or Wanrenzhan..."

"Then one of us is."

"If Ling Buchen isn't the killer..."

"Does he really dare stand beside He Yu?"

"If He Yu turns out to be the killer..."

"Taking him outside means your own elimination."

"Permanent death."

At this moment...

Eugene suspected Ling Buchen.

Qiong shook her head.

Her expression was serious.

"Ling Buchen has always stood with He Yu."

"I don't think that alone makes him suspicious."

He Yu had willingly given Ling Buchen a divine artifact.

Ling Buchen trusting He Yu unconditionally...

Made perfect sense.

Just as Qiao Yuan had died for her.

Not every contestant placed their own survival above everything else.

Not everyone wanted only slaughter.

She didn't believe this could serve as evidence.

After a pause, she continued.

"I also don't support killing everyone."

If none of them was the killer...

Then the safest strategy...

Was the one the system had subtly suggested.

Kill everyone else.

Escape alone.

Qiong rejected that completely.

"Whoever the killer is..."

"They won't admit it."

"So instead..."

"Let's prove who isn't the killer."

Last night's events had provided many clues.

Since they still couldn't identify the killer...

They had to start with the murderer.

Then eliminate possibilities one by one.

The Night of Chaos forcing someone to kill...

Was itself suspicious.

It probably pointed directly toward the killer.

Time was running out.

Qiong was growing increasingly anxious.

Qu Wu raised his hand.

"I'm not the killer."

"I never received any killer notification."

"And Eugene can confirm I didn't kill Annie."

"My target was He Yu."

"I'm currently the only person who can be confirmed not to be yesterday's murderer."

As he spoke...

Everyone stared directly into his eyes.

Watching every expression.

Every movement.

Trying to determine...

Whether he was lying.

Their lives depended on it.

After thinking carefully, Eugene nodded.

"Correct."

"My memory fragment showed Annie still standing."

"And Qu Wu unconscious on the ground."

Duan Yuchen suddenly looked toward He Yu.

His expression became exceptionally serious.

"I don't know whether I should trust you anymore..."

"But only you can figure this out in the shortest amount of time."

"He Yu."

"Are you the killer?"

He Yu looked directly back at him.

His expression was utterly sincere.

"I never received any killer notification."

"I have no killer-related information whatsoever."

"What were you doing just now while looking down?"

Siya narrowed her eyes suspiciously.

He Yu's expression became solemn.

Adjusting his glasses, he answered,

"Keep analyzing."

"I'll listen."

"I'm thinking about something."

"Don't worry about me for now."

Eugene: "..."

"I really have to admit..."

"That makes you look exactly like the killer."

He Yu normally noticed immediately whenever someone lied.

Or behaved suspiciously.

This morning...

He'd said no one seemed to be lying.

Now...

He'd suddenly withdrawn into his own thoughts again.

It was undeniably suspicious.

But...

Given He Yu's intelligence...

If he truly were the killer...

He wouldn't behave like this.

He would've disguised himself perfectly.

Duan Yuchen still remembered playing Who's the Undercover? with him.

Throughout the entire game...

He'd never suspected He Yu once.

He'd been led around effortlessly.

With intelligence and acting ability on that level...

He Yu wouldn't make mistakes like these.

Unless...

He was deliberately doing the opposite.

Rubbing his forehead, Eugene reconstructed everyone's statements from that morning with perfect mechanical memory.

He recited them one by one.

"Wanrenzhan had two memory fragments."

"The first involved killing Annie."

"We don't know whether he actually carried it out."

"The second..."

"Was going to sleep beside He Yu."

"He failed."

"Zhen Xing's fragment showed him stopping Wanrenzhan."

"The two fought."

"My fragment..."

"Qu Wu unconscious."

"Annie standing."

"Qu Wu's fragment..."

"He went to kill He Yu."

"He Yu's fragment..."

"He went to kill Annie."

"Duan Yuchen's fragment..."

"He went to Room 705."

"But doesn't know why."

Qiong nodded before continuing.

"We can eliminate Siya."

"And me."

"And Qu Wu."

Eugene continued thinking aloud.

"Duan Yuchen's assigned role was someone bullied by everyone."

"He could've wanted to kill Annie."

"But according to his role..."

"He wouldn't attack while Annie was still unharmed."

"So his probability drops."

Duan Yuchen nodded.

"I also don't think it's Zhen Xing."

"Wanrenzhan had already acted before him."

"If Wanrenzhan attacked..."

"Zhen Xing had no reason to."

Siya frowned deeply.

"That leaves only four suspects."

"He Yu."

"Eugene."

"Wanrenzhan."

"And Ling Buchen."

Then she added,

"Wanrenzhan doesn't matter anymore."

"He's already dead."

Even if he somehow remained alive...

Once they escaped...

The system would erase him anyway.

There was no point considering him.

Without Wanrenzhan present...

They had no way of obtaining any additional information.

They could only analyze those still here.

Qu Wu scratched his head.

"I get it."

"So now we just need to determine..."

"Whether Eugene's timeline came before He Yu's..."

"Or after."

"Since only three suspects remain."

The instant those words fell...

Everyone turned toward the same person.

Their expressions subtly changed.

Eugene's gaze became impossible to read.

"Ling Buchen..."

"This morning..."

"I don't think you ever expressed an opinion."

"So..."

"What exactly..."

"...did you do last night?"

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