The first thing Hae-in learned about 2016 was that nobody agreed on what had happened.
The courthouse called it a records modernization project.
The detention facility called it an administrative restructuring.
The municipal archive described it as a routine transfer of legacy documents.
Three departments. Three explanations. One year.
And in every surviving account, the same sentence appeared:
Certain records were excluded from migration pending review.
Hae-in read it for the fourth time.
"Pending review by whom?" she asked.
Kang sat across from her, surrounded by printouts.
"That's the problem. Every department refers to another department."
"Convenient."
"Very."
He turned his laptop toward her.
"I found the original project notice. It was issued in February 2016. The courthouse was converting its paper archive into a searchable digital system."
"Who supervised it?"
"Deputy records director at the time. A man named Kwon Dae-sik."
"Where is he now?"
"Retired. Lives outside the city."
"Any connection to our case?"
"Not yet. But look at the project team."
He pointed to a list of names.
Hae-in scanned it.
Records officers. Information technicians. Two outside contractors.
Then she stopped.
Lim Seung-tae — Temporary Systems Liaison.
She looked at Kang.
"He told us he joined the archive in 2016."
"He wasn't lying about the year."
"But he left out the position."
Kang nodded.
"His official employment file says he started as a temporary systems liaison in February. His permanent appointment came in November."
"Who recommended him?"
"That's what I'm trying to find."
Hae-in took the list.
"Get me the original appointment letter. Not a summary from the current personnel system."
"You think someone altered his employment history?"
"I think the current system tells us what the courthouse wants us to see. I want to know what the courthouse recorded at the time."
Kang collected the papers.
"You know, most people would have stopped at the first unexplained transfer."
"Most people wouldn't have found the transfer."
"Fair point."
He stood.
"There's something else."
Hae-in waited.
"Three employees from that project left within six months. One resigned. One transferred to another district. The third has no departure record."
"Name?"
"Yoon Hye-jin. Records technician."
"Find her."
"Already working on it."
"Then why are you telling me?"
"Because her personnel photograph is missing."
Hae-in looked up.
Kang's expression was serious now.
"Same problem as Jang Yu-ri?"
"Maybe. But I checked the photograph index. There's a record that a photograph existed. The image itself is gone."
Hae-in stood.
"Let's start with Kwon Dae-sik."
Kwon Dae-sik answered the door himself.
He was seventy-two, neatly dressed, and visibly irritated by the interruption. When Hae-in introduced herself and explained the investigation, he didn't invite them inside.
"I retired ten years ago," he said. "Whatever happened to the archives after that is not my responsibility."
"We're investigating a missing file that was reclassified during your project."
"Which file?"
"C-17/08. Later designated C-18."
For the first time, his expression changed.
It was slight, but Hae-in saw it.
Kwon glanced at Kang.
Then back at her.
"Where did you get that code?"
"An archive transfer record."
"Those codes should have been discontinued."
"When?"
"During the migration."
"Were they discontinued, or were the records moved under new classifications?"
Kwon's mouth tightened.
"You're asking questions about an administrative project that ended ten years ago."
"Then this should be easy to explain."
He looked at her for several seconds.
Finally, he stepped aside.
"Five minutes."
His apartment was clean and spare. A television played quietly in the adjoining room. Kwon led them to a small dining table and sat down without offering refreshments.
Hae-in placed a copy of the transfer history in front of him.
"Did you authorize the reclassification of C-17/08?"
Kwon examined the page.
"No."
"Do you recognize the code?"
"Yes."
"What's C-18?"
"I don't know."
"You just said the codes should have been discontinued."
"I remember the code. That doesn't mean I know what the file contained."
"Who did?"
He placed the paper on the table.
"During the migration, we received instructions not to digitize certain records. Some concerned ongoing legal proceedings. Others contained protected personal information."
"Who issued the instructions?"
"Senior management."
"Which person?"
Kwon hesitated.
Then he said, "Director Baek."
Hae-in wrote down the name.
"Baek what?"
"Baek Seung-chul. He was the courthouse administrative director."
"Did he explain why these records were excluded?"
"He said they were subject to a separate review."
"Was there a separate review?"
"I never saw one."
"Did you ask?"
Kwon looked toward the window.
"Once."
"What happened?"
"He told me to finish the project."
Hae-in waited.
Kwon rubbed his thumb against the edge of the table.
"I was responsible for hundreds of thousands of records. I couldn't stop the entire migration because one category had been withheld."
"Did you know the withheld category included detention records?"
"Yes."
"Did you know those records included people who disappeared?"
"No."
The answer came quickly.
Hae-in watched him.
"Mr. Kwon, I'm not asking you to accept responsibility for something you didn't know. I'm asking what you saw."
He was quiet.
Then he stood and walked to a cabinet.
From the bottom drawer, he removed a thin folder.
"I kept this after retirement. I shouldn't have."
He placed it in front of her.
Inside were printed emails, meeting notes, and a handwritten project schedule.
The papers were dated between February and October 2016.
Hae-in examined them carefully.
Most concerned routine technical problems.
Then she reached a meeting note dated 17 August 2016.
One sentence had been underlined.
The excluded archive is not to be reconstructed from secondary sources.
Below it was a handwritten addition:
No duplicate index. No cross-reference. No retained copy.
Hae-in read it twice.
"Who wrote this?"
Kwon pointed to the initials at the bottom.
"B.S.C. Director Baek."
"Why would anyone prohibit a duplicate index?"
"That's what I asked."
"And?"
Kwon returned to his chair.
"He told me some records were never supposed to have entered the courthouse archive in the first place."
Hae-in looked up.
"Then why were they there?"
"He didn't say."
"Did you see the records?"
"No."
"Did anyone?"
Kwon looked at the handwritten note.
"Someone had to identify which files were excluded."
"Who?"
"Your father's name came up."
The room went quiet.
Kang shifted in his chair.
Hae-in didn't move.
"My father?"
"Seo Jin-woo. I didn't know him personally. But his name was on a list of people whose earlier work was to be consulted during the migration."
"What list?"
Kwon searched through the folder.
After a moment, he found another sheet.
It was an administrative reference list.
Six names.
Beside five were job titles or department numbers.
Beside Seo Jin-woo's name, someone had written:
HISTORICAL CASE REVIEW — DO NOT CONTACT FAMILY.
Hae-in stared at the words.
"Why would you need to contact my family?"
Kwon looked uncomfortable.
"I don't know."
"Was my father alive in 2016?"
"No. I checked the date when I heard his name. The instruction was entered after his death."
"Then who was supposed to review his work?"
"I don't know."
Hae-in carefully slid the document into an evidence sleeve.
"Mr. Kwon, did Director Baek remain in office after the migration?"
"Until 2018."
"Where is he now?"
"His family said he moved abroad."
"Which country?"
"I don't know."
Kwon looked at the documents spread across the table.
"I thought this was about a missing file."
"It is."
"Then why are you asking about a dead man?"
Hae-in closed the folder.
"Because someone is still moving his records."
Outside, Kang waited until they reached the car.
"Your father's work was included in the 2016 migration review."
"Yes."
"Two years after he died."
"Yes."
"And someone specifically wrote that his family shouldn't be contacted."
Hae-in opened the passenger door but didn't get in.
"What do you think that means?"
Kang considered the question.
"Someone wanted his records examined without alerting anyone who might know what he was doing."
"Or someone wanted the review to appear more suspicious than it was."
He nodded.
"That's possible."
She got into the car.
"Find Director Baek."
"His family says he moved abroad."
"Families can be wrong."
"Or uncooperative."
"Find the original departure record, then. Immigration records if we can obtain them lawfully. Employment records. Pension correspondence. Anything that establishes when he left."
Kang started the engine.
"And Yoon Hye-jin?"
"We find her too."
He glanced at her.
"Which one first?"
"Whichever one is easier to find."
Yoon Hye-jin was easier to find.
Not because she had left a clear trail, but because she had filed a formal complaint in 2017.
The complaint was buried in an employment dispute database under a different department name.
Hae-in read the summary on Kang's screen.
COMPLAINT: UNAUTHORIZED REMOVAL OF ARCHIVED DOCUMENTS.
OUTCOME: NO FURTHER ACTION.
"Who removed them?" she asked.
"Not named in the summary."
"Get the full complaint."
Kang opened the attached scan.
The first page contained Hye-jin's account.
She had been assigned to verify records excluded from the digitization project. During the review, she found that several boxes listed in the original inventory were absent from the archive.
She reported the discrepancy.
Two days later, her access credentials were suspended.
A week later, she was transferred to another department.
Three months after that, she resigned.
Hae-in scrolled to the final page.
There was a handwritten statement.
I did not authorize the removal. I did not sign the transfer. I was instructed to record the boxes as received.
Below it:
The signature is not mine.
Kang looked at her.
"The transfer record."
"Yes."
"The one that doesn't have a location."
Hae-in nodded.
"Can we compare the signature?"
"There's a scan of the disputed receipt."
He opened it.
The signature at the bottom was difficult to read, but the initials were clear.
Y.H.J.
Hae-in placed it beside the 1992 receipt bearing her father's name.
The handwriting styles were different.
But both forms had the same unusual feature: the authorization field had been completed in blue ink, while the rest of the document was black.
She zoomed in.
"Look at the date."
Kang enlarged the image.
The date on Hye-jin's receipt was 14 SEPTEMBER 2016.
Exactly ten years before the C-18 transfer recorded in the system.
Hae-in stared at the two dates.
September 14, 2016.
September 14, 2026.
Same day. Ten years apart.
"That's deliberate," Kang said.
"Probably."
"What happened on the first date?"
Hae-in looked back at Hye-jin's complaint.
The missing boxes had been marked received.
The transfer had been recorded.
And Hye-jin had denied signing it.
"Find her current address," Hae-in said.
Yoon Hye-jin lived in a residential district about forty minutes from the courthouse.
She answered the door after Hae-in had knocked twice.
She was in her late forties, with her hair tied loosely behind her head. Her gaze moved from Hae-in's identification to Kang's face.
"I already spoke to investigators about this."
"When?" Hae-in asked.
"Years ago."
"We're investigating a separate case involving the same archive."
Hye-jin's expression changed at the word archive.
She opened the door wider.
"Come in."
Her apartment was small but orderly. A stack of old books sat beside the sofa. On the wall hung a framed certificate from a records-management training program.
Hae-in showed her the 2016 complaint.
"Did you write this?"
"Yes."
"Did you sign the transfer receipt?"
"No."
"Do you know what happened to the boxes?"
Hye-jin sat down.
"They were supposed to go to a restricted storage section."
"Which section?"
"I never saw the destination."
"Who instructed you to mark them as received?"
Hye-jin looked at the receipt.
"Director Baek."
"Did you see him remove the boxes?"
"No. He told me the transfer had been approved and that the courier had already collected them."
"But you marked them received."
"I was told to complete the inventory. When I asked for the courier's name, he said it was an internal transfer."
"Why didn't you refuse?"
Hye-jin looked at her.
"Because I was a junior employee, and he was the administrative director."
Hae-in accepted that without comment.
"Why did you file a complaint?"
"Because I found out the boxes weren't where the inventory said they were."
"How?"
"I went to check the receiving shelf. It was empty."
"Were the boxes labelled?"
Hye-jin hesitated.
"Most were."
"What did the labels say?"
She shook her head.
"I don't remember all of them."
"Do you remember one?"
Hye-jin looked down at her hands.
"C-17."
Hae-in kept her expression neutral.
"Anything else?"
"There was a second code. I thought it was a destination number."
"C-18?"
Hye-jin lifted her eyes.
"Yes."
The room seemed to go still.
"Did you see the contents?" Hae-in asked.
"No. But I saw a photograph that had been left on top of one of the boxes."
"What photograph?"
"An empty chair."
Hae-in felt her attention sharpen.
"Where?"
"I don't know. A bare room. Concrete walls. The chair was in the middle."
"Was there anything else in the photograph?"
Hye-jin thought for a moment.
"A shadow on the floor. But no person."
Hae-in remembered Director Choi's account.
The photograph of an empty chair taken before anyone entered Room 08.
"Did you keep a copy?"
"No. I was too frightened to take anything."
"Who else saw it?"
"Director Baek. And a man who came to collect the boxes."
"Can you describe him?"
"Middle-aged, maybe. Gray coat. I didn't see his face clearly."
Kang looked at Hae-in.
The gray-coated man had appeared in the courthouse archive in 2026.
Hae-in asked one more question.
"Did the man give you his name?"
"No."
"Did he sign anything?"
Hye-jin nodded slowly.
"He signed the collection sheet."
"Do you remember the name?"
"No. But I remember what he said when Director Baek asked whether the transfer had been completed."
"What?"
Hye-jin's voice dropped.
"He said, 'The eighteenth has been accounted for.'"
Hae-in exchanged a glance with Kang.
Hye-jin continued.
"I didn't understand what he meant. I thought it was just an inventory number."
"Did Director Baek respond?"
"He said, 'Then the rest can be closed.'"
"What rest?"
"I don't know."
Hae-in waited, but Hye-jin had nothing more.
Before leaving, Hae-in gave her a contact number and asked her to call if she remembered anything else.
At the door, Hye-jin caught her arm lightly.
"Detective?"
Hae-in turned.
"If you're looking for those records, don't assume they were all destroyed."
"Why?"
"Because when I filed the complaint, I received a call from someone who said the boxes had been moved for safekeeping."
"Who called?"
"They didn't give a name."
"What did they say?"
Hye-jin swallowed.
"They said the records would be returned when the people named in them no longer mattered."
Hae-in held her gaze.
"And do you believe that?"
Hye-jin shook her head.
"No. I think they were waiting for everyone to forget the names."
On the drive back, neither detective spoke for several minutes.
The afternoon traffic moved slowly around them.
Finally, Kang said, "The eighteenth was accounted for."
Hae-in looked out the window.
"Yes."
"Not found. Not recovered. Accounted for."
"There's a difference."
"An important one?"
"Maybe."
She opened her notebook.
The sequence was beginning to take shape, but it still had gaps.
In 1992, her father had handled the box.
In 2008, records connected to Room 08 had been moved.
In 2016, boxes had disappeared from the courthouse archive, and an employee had been ordered to falsify their receipt.
In 2026, someone had accessed the same file again.
The dates weren't random.
Someone had kept the chain alive for thirty-four years.
But the reason remained hidden.
Kang pulled into a quiet parking area.
"I want to ask you something."
"Go ahead."
"Your father. When you think about him now, do you still believe he was investigating the system?"
Hae-in closed her notebook.
"I believe he was trying to understand it."
"That's not quite the same thing."
"No."
She looked down at the photograph of the empty chair, which she had copied from Hye-jin's record.
"If he knew the boxes were being moved, why did he let them leave the courthouse?"
"Maybe he couldn't stop it."
"Maybe."
"Or maybe he believed moving them was safer than leaving them there."
Hae-in considered that.
It was possible.
Her father had spent years trying to preserve records that someone else wanted erased. He might have made compromises to protect them.
Or he might have made a decision he later regretted.
She wasn't ready to decide which.
Her phone vibrated.
An email from the courthouse had arrived.
The subject line read:
REQUEST FOR ACCESS LOG — C-18 TRANSFER
She opened it.
The message contained one attachment.
A scanned authorization form dated September 14, 2026.
The transfer had been approved under a temporary administrative account.
The account holder's name was blank.
But in the lower corner, beneath the approval stamp, was a handwritten note.
RETURN TO ORIGINAL LOCATION AFTER REVIEW.
Hae-in enlarged the image.
Below the note was a reference number.
C-18 / 08.
She stared at it.
Then she turned to Kang.
"C-18 isn't the final designation."
"What do you mean?"
"Look."
He read the reference.
"C-18 slash 08."
"Someone linked the missing archive to Room 08."
Kang sat back.
"Then the file may not be in the courthouse anymore."
"No."
"Where would they return it?"
Hae-in looked at the last line of the authorization form.
ORIGINAL LOCATION.
The original location wasn't written anywhere.
She folded her arms.
"That's what we need to establish."
Kang looked at the road ahead.
"And if the original location is beneath Room 08?"
Hae-in didn't answer immediately.
The warning from Park Eun-sook returned to her.
DON'T GO BELOW.
She looked at the date on the form.
September 14.
Ten years after the first transfer.
Someone had not only moved the file. They had instructed that it be returned.
Which meant C-18 might still exist.
And whoever was responsible believed it belonged somewhere specific.
Hae-in closed the email.
"We don't go below," she said. "Not until we know what we're walking into."
Kang nodded.
"Then what's next?"
She looked at the last surviving clue from the 2016 transfer.
THE EIGHTEENTH HAS BEEN ACCOUNTED FOR.
"We find out what happened to the other boxes."
She paused.
"And we find the man who collected them."
Outside, the traffic began moving again.
Hae-in watched the courthouse disappear behind the buildings.
For ten years, someone had been able to move records without leaving a proper destination.
Now that someone had moved one again.
And this time, the transfer had left a trail.