The only sound was the hum of the old machines.

Sako Hido stood motionless before the table.

His eyes were fixed on the last sentence.

Subject 0 Status: Alive.

Haru swallowed hard.

"This... doesn't make sense."

Sako didn't reply.

He slowly closed the file.

Then he opened it again.

The same sentence.

The same words.

Nothing had changed.

His heart began to beat strangely.

For the first time in years...

He felt afraid.

I'm... alive?

Then who is Subject 0?

And why does he have my name?

He slowly raised his hand and looked at his palm.

There were old scars.

Scars he couldn't remember how he got.

He clenched his fist tightly.

What is the Organization hiding from me?

Is my whole life... a lie?

"Sako?"

 He raised his head.

Haro was looking at him with concern.

"You look pale."

Sako took a deep breath.

"I'm fine."

But his voice wasn't convincing.

Then...

A faint voice echoed inside his head.

"...I'm back."

His body froze.

His eyes widened slightly.

He looked around quickly.

No one.

Nothing.

Just darkness.

"Did you hear something?"

Haro asked.

Sako remained silent.

He heard it clearly.

That voice...

Was it inside my head?

The voice echoed again.

"...I'm back."

Sako clutched his head.

His breathing quickened.

Who are you?

And why are you talking to me?

"Sako!"

Haro grabbed his shoulder.

He snapped back to reality.

"What happened?"

 Sako breathed slowly.

"...Nothing."

But his eyes were saying something else.

Elsewhere...

Inside the medical ward.

Maya Asaski sat alone at her desk.

Dozens of files lay before her.

But she wasn't reading anything.

She was thinking about Sako.

Since this morning...

He'd been different.

Quieter.

More absent-minded.

She sighed softly.

"What are you hiding, Sako..."

At that moment...

A beep came from the computer.

Beep

She looked up.

A new window appeared on the screen.

But she didn't open it.

She took a deep breath.

Then she clicked on it.

Only one message appeared.

ACCESS DENIED UNDERGROUND PROJECT SUBJECT 0

Her eyes widened.

"Subject... 0?"

She'd never heard that name before. 

Then...

Another message appeared.

Unauthorized access detected.

Her face paled.

Someone...

was watching her.

And suddenly...

The computer screen went dark.

Darkness filled the office.

Then...

A reflection appeared behind her in the windowpane.

Her body froze.

Very slowly...

She turned.

But...

There was no one there.

And down below...

Inside the dark lab...

She opened one eye in the darkness.

Then...

A quiet voice came through.

"It all started again..."