The photograph stayed on Hae-in's desk long after Kang had left.
Three people.
Han Dong-wook.
Her father.
And the man neither of them had ever properly named.
Hae-in turned the photograph over.
Nothing.
She placed it beside the notebook.
J.W. — SECOND DOOR — 2008
SHE OPENED IT FIRST.
The words had been pressed into the paper hard enough to leave a faint impression on the next page.
Hae-in ran her thumb over it.
Her father had written the note years before she knew any of this existed.
Which meant he had known the woman.
Or, at the very least, known that she existed.
And if the woman had been telling the truth, she had been involved in the same incident that eventually changed everything.
Hae-in picked up her phone.
"Kang."
He answered on the fourth ring.
"You're still awake."
"So are you."
"I was expecting you to say that."
"Come back."
There was a short silence.
"Anything new?"
"Not yet."
"Then why—"
"I found something."
That was enough.
Twenty minutes later, Kang walked into the office carrying two paper cups.
He put one beside Hae-in.
She looked at it.
"Coffee."
"I know."
"You're not going to drink it?"
"I might."
"You said that last time."
"I drank it eventually."
"Three hours later."
Hae-in ignored him.
Kang pulled a chair over.
"What did you find?"
She pushed the notebook toward him.
He read the two lines.
His expression changed slightly.
"J.W."
"Could be initials."
"Could be a person."
"That's what I'm thinking."
"Male or female?"
Hae-in looked at the photograph from Room 08.
"The woman said she was there in 2008."
Kang nodded.
"And she said she opened the second door."
"Yes."
"Your father's note says the same thing."
"Yes."
He looked at her.
"Then we start with 2008."
Hae-in nodded.
"I already pulled the renovation personnel list."
She slid a folder across the desk.
Kang opened it.
There were twenty-three names.
Construction workers.
Electricians.
Engineers.
Two security officers.
Three detention employees.
One municipal inspector.
And at the bottom—
SEO JIN-WOO.
Kang frowned.
"He wasn't assigned to the renovation."
"No."
"Then why is he here?"
"That is what I want to know."
Kang turned the page.
There was another name circled in red.
JANG YU-RI.
Female.
Thirty-one years old in 2008.
Temporary administrative contractor.
No detention employment history.
No construction qualifications.
No reason, according to the personnel records, for her to have been anywhere near Cell Block C.
Kang looked up.
"J.W. doesn't match."
"No."
"But this person was there."
"According to the list."
"Where is she now?"
Hae-in turned another page.
The answer was written in a single line.
CONTRACT TERMINATED — 19 APRIL 2008.
No reason.
No forwarding address.
No subsequent employer.
Kang stared at it.
"One day after the incident."
"Yes."
"That's not normal."
"No."
He continued reading.
Then stopped.
"Wait."
He pointed to the signature at the bottom.
Hae-in leaned closer.
The termination had been approved by—
Han Dong-wook.
Neither spoke.
The office suddenly felt smaller.
At 8:12 the next morning, Hae-in and Kang were standing outside the municipal records building.
The clerk behind the desk looked at the request.
"Jang Yu-ri?"
"Yes."
"Old file."
"I know."
The clerk typed for several seconds.
"Employment records are restricted."
"Why?"
"Personnel privacy."
"She's not a current employee."
"Still restricted."
Hae-in placed the authorization letter on the desk.
The clerk read it.
His expression changed.
He disappeared into the back room.
Kang leaned toward Hae-in.
"You think she's the woman?"
"No."
"That's convincing."
"I think she was connected to the same event."
"And if she is?"
"Then we find out what happened on April seventeenth."
Kang nodded.
The clerk returned carrying a thin gray folder.
"That's all we have."
Hae-in opened it.
The first pages were ordinary.
Name.
Date of birth.
Temporary contract.
Position.
Salary.
Emergency contact.
Then—
WORK LOCATION: CENTRAL DISTRICT DETENTION FACILITY.
Hae-in stopped.
Kang leaned closer.
"She wasn't supposed to be there."
"Exactly."
The next page was a handwritten assignment.
SPECIAL ARCHIVE INVENTORY — CELL BLOCK C
No supervisor listed.
No department listed.
No reason for the assignment.
Just a date.
17 APRIL 2008.
Hae-in turned the page.
There was one sentence.
Employee reported unauthorized movement of archived materials.
Below it:
Matter resolved.
Kang looked at her.
"Same language."
"Yes."
The same phrase had appeared in the 1992 report.
Resolved internally.
Hae-in continued.
The next page had been removed.
Not torn.
Removed carefully.
The binding had been opened and closed again.
Someone had taken exactly one page.
Kang touched the empty space.
"Someone wanted this specific information gone."
Hae-in looked at the file number.
C-17/08-JY.
She wrote it down.
Then she noticed something else.
At the bottom of the folder, beneath the official papers, was a photocopy.
It had been folded twice.
Hae-in unfolded it.
A photograph.
Black and white.
Cell Block C.
The photograph showed the corridor outside Cell Seventeen.
Four people stood near the service door.
Han Dong-wook.
Seo Jin-woo.
Jang Yu-ri.
And another person.
A woman.
Her face had been crossed out with black ink.
Not blurred.
Not damaged.
Someone had deliberately drawn over it.
Hae-in stared.
Kang whispered,
"That's her."
Hae-in shook her head.
"You don't know that."
"The woman from Room 08."
"We don't know what she looked like."
"But your father did."
Hae-in looked at the photograph again.
Her father was standing several feet away from the woman.
He wasn't looking at the camera.
He was looking directly at her.
And the woman was looking at the service door.
Not at Jin-woo.
Not at Han.
At the door.
The second door.
Hae-in turned the photograph over.
There was handwriting.
Not her father's.
Not Han's.
A single sentence:
SHE DIDN'T OPEN IT FOR THEM.
Hae-in's eyes narrowed.
Kang read it over her shoulder.
"Then who did she open it for?"
Hae-in said nothing.
She looked at the black mark covering the woman's face.
Then at her father's expression.
He hadn't looked frightened.
He had looked worried.
As though he already knew what would happen next.
They returned to the station before noon.
Hae-in asked Kang to search every surviving record for Jang Yu-ri.
"Birth records, employment, address changes, anything."
"What about the woman?"
"There's no name."
"Then what am I searching?"
"People connected to Room 08."
Kang nodded.
He sat down.
After nearly an hour, he called her over.
"I found something."
Hae-in stopped beside his desk.
Kang turned the monitor toward her.
There was an old municipal address registration.
JANG YU-RI.
Last recorded address:
Daehan Women's Residential Facility.
Date:
May 2008.
Hae-in stared at it.
"Residential facility?"
"That's what it says."
"Why?"
"There's no explanation."
"Is the facility still operating?"
"No."
"Records?"
"Destroyed after closure."
Hae-in looked at him.
"Destroyed?"
"Officially."
She was quiet.
Then Kang added,
"But I found the former director."
Hae-in looked up.
"Where?"
"She's alive."
"Name?"
Kang hesitated.
"Park Eun-sook."
"Address?"
He handed her a piece of paper.
Hae-in folded it once and put it into her coat pocket.
"Let's go."
The former director lived alone in a small apartment on the eastern side of the city.
She was eighty-four.
When Hae-in showed her identification, the woman stared at it for several seconds.
Then at Hae-in's face.
"You're his daughter."
Hae-in didn't move.
"You knew my father?"
"I knew of him."
"That wasn't my question."
Park Eun-sook looked away.
"Seo Jin-woo came here once."
"When?"
"2008."
"Why?"
"He asked about a woman."
"Jang Yu-ri?"
The old woman's fingers tightened around the edge of her blanket.
"Yes."
Hae-in sat down.
"What happened to her?"
"She came here after leaving the detention facility."
"Why?"
"She was afraid."
"Of whom?"
Park Eun-sook looked toward the window.
"I don't know."
"You do."
"No."
"You've already told me my father came here."
The old woman said nothing.
Hae-in placed the 2008 photograph on the table.
Park Eun-sook looked at it.
Her face changed.
Not fear.
Recognition.
She touched the crossed-out face.
"She shouldn't have gone back."
Hae-in leaned forward.
"Back where?"
The woman's eyes lifted.
"To Room 08."
Silence.
Kang sat beside Hae-in, completely still.
Hae-in asked,
"Did she open the second door?"
Park Eun-sook shook her head.
"No."
Hae-in paused.
"But she told me she did."
The old woman's eyes narrowed.
"She told you that?"
"Yes."
"Then she's still hiding something."
Hae-in felt a small shift in the room.
Not surprise.
Confirmation.
"What was behind the second door?"
Park Eun-sook looked at her for a long moment.
Then she said quietly,
"Nothing."
Kang frowned.
"Nothing?"
"That's what they wanted everyone to believe."
Hae-in waited.
The old woman continued.
"Behind the second door was another room."
Hae-in's expression hardened.
"Room 08?"
"No."
A pause.
"A room beneath it."
Kang looked at Hae-in.
Park Eun-sook lowered her voice.
"Your father found the entrance."
"When?"
"Before Yu-ri disappeared."
Hae-in's fingers tightened around the photograph.
"Then why did he never tell me?"
The old woman looked directly at her.
"Because he knew you would look."
Hae-in didn't answer.
Park Eun-sook reached toward a drawer beside her chair.
Her hand trembled slightly.
She took out a small envelope.
Yellowed.
Sealed.
And placed it on the table.
"This was left here in 2008."
"By Yu-ri?"
"No."
"Then who?"
The old woman looked at Hae-in.
"Your father."
Hae-in stared at the envelope.
There was writing across the front.
Her father's handwriting.
Three words.
FOR HAE-IN — 18
She looked at the date.
There was none.
Only the number.
And beneath it, almost invisible—
Do not open until you know why she lied.
Hae-in slowly picked up the envelope.
For the first time since entering the apartment, Park Eun-sook looked afraid.
"Don't open it here."
"Why?"
The old woman looked toward the closed front door.
"Because I don't think you're the only person who came looking for it."
Hae-in froze.
From somewhere outside the apartment—
three slow knocks.
Kang stood immediately.
Hae-in looked at the door.
Three knocks again.
Then silence.
She slipped the envelope inside her coat.
Kang moved toward the entrance.
Hae-in stopped him.
"Wait."
He looked back.
She listened.
Nothing.
No footsteps.
No elevator.
No voices.
Only the quiet hum of the apartment.
Then, from behind the door, a voice spoke.
Low.
Distorted.
Familiar.
"You were warned not to open the second door."
Hae-in's face went still.
Kang looked at her.
The voice continued.
"And now you're holding the eighteenth."
The footsteps outside moved away.
Hae-in opened the door.
The hallway was empty.
But on the floor was a photograph.
She picked it up.
It showed Room 08.
Not from 2008.
From today.
And in the photograph, someone was standing inside the room.
A woman.
Her face was turned away.
On the back, written in black ink:
SHE OPENED IT FOR YOU.
Hae-in stared at the photograph.
Then at the envelope inside her coat.
For the first time, she wondered whether the woman behind Room 08 had actually been trying to keep her away from the second door—
or had been trying to make sure Hae-in reached it.