Rain still clung to the courthouse steps when Seo Hae-in reached the parking lot.
The detective was already waiting beside his car.
He wasn't looking at his phone anymore.
He was looking at her.
"You should see this before you go home."
"I wasn't going home."
"I know."
He opened the passenger door.
"Get in."
Twenty minutes later—
they entered the Digital Forensics Division.
Unlike the noisy police headquarters downstairs, this floor was almost silent.
Monitors glowed behind glass walls.
Analysts moved between desks without speaking above a whisper.
Everything felt precise.
Measured.
Seo Hae-in liked places like this.
Machines didn't make assumptions.
People did.
A forensic analyst stood as they approached.
"You asked for the fingerprint comparison."
He slid a thin folder across the table.
"We have a match."
Seo Hae-in opened it.
The name meant nothing.
Han Do-jin.
Age: Thirty-eight.
Occupation: Court-certified audio systems technician.
Her eyes lingered on one line.
Contracted to maintain courtroom recording systems, police interview rooms, and detention center communication equipment.
She looked up.
"The same detention center?"
"Yes."
"The interview rooms?"
"Yes."
"The courthouse?"
"Yes."
The analyst nodded.
"Anywhere official audio equipment is installed."
The detective let out a slow breath.
"So he could legally enter all three locations."
"Without attracting attention," Seo Hae-in finished.
"But..."
The analyst hesitated.
"There is something strange."
Seo Hae-in looked up again.
"His fingerprints were identified on the child's drawing."
The detective frowned.
"Why would an audio technician touch a child's drawing?"
"We don't know."
"And according to building access logs?"
The analyst clicked another file.
"He never entered the apartment."
Silence.
The room seemed smaller.
"So either the fingerprint is wrong..."
The detective folded his arms.
"...or the records are."
Seo Hae-in closed the folder.
"The records."
She didn't hesitate.
The detective raised an eyebrow.
"That quickly?"
She looked at him.
"Fingerprints don't erase themselves."
Hours later—
Han Do-jin's personnel file lay open across her desk.
No disciplinary reports.
No complaints.
No financial issues.
No unexplained absences.
It was...
perfect.
Too perfect.
She turned another page.
Then another.
Nothing.
Almost nothing.
She reached the final page.
Blank.
Not empty.
Blank.
The employment history before six years ago had been redacted.
Not blacked out.
Removed.
The page numbering skipped.
Page twelve.
Page fourteen.
No page thirteen.
She stared at it.
Someone hadn't hidden the information.
Someone had erased the fact that information ever existed.
Her phone vibrated.
The detective.
"You noticed it too?"
"The missing page."
"Yeah."
"I checked the archive."
"And?"
"There isn't another copy."
Seo Hae-in leaned back.
"Personnel records always have backups."
"Exactly."
"They don't."
Silence settled between them.
Someone had cleaned this file long before anyone knew to look.
The next morning—
Han Do-jin arrived at the courthouse.
Exactly 8:15.
Exactly as scheduled.
He carried a gray equipment case.
Stopped to greet the security guard.
Signed the maintenance log.
Smiled politely.
Entirely ordinary.
Seo Hae-in watched from across the street.
Black trench coat.
Hair tied neatly back.
Dark sunglasses despite the cloudy morning.
She didn't move.
Didn't approach.
She watched.
Routine reveals more than confrontation.
Han Do-jin repaired a microphone in Courtroom Two.
Spoke briefly with a clerk.
Checked a speaker near the ceiling.
Then left.
Nothing suspicious.
Nothing at all.
Which was suspicious.
"You're disappointed."
The detective joined her.
"I'm patient."
"You expected him to make a mistake."
"No."
She kept watching the courthouse doors.
"I expected him to know I was watching."
The detective looked confused.
"You think he saw you?"
She smiled faintly.
"I know he did."
As if on cue—
Han Do-jin stepped outside.
He adjusted the strap on his equipment case.
Looked directly across the street.
Their eyes met.
Neither of them looked away.
He smiled politely.
Not nervous.
Not surprised.
Just...
pleasant.
Then he gave a small, respectful nod.
The kind one stranger gives another.
Before walking away.
"He recognized you."
The detective's voice was barely above a whisper.
"Yes."
"And?"
Seo Hae-in continued watching until he disappeared into the crowd.
"He wanted me to know."
That evening—
she returned to the child's apartment.
Officially, the investigation was paused while additional forensic work continued.
Unofficially...
questions didn't wait.
The apartment felt colder than before.
Not because of the weather.
Because she knew more now.
Knowledge changes places.
She stood in the child's bedroom.
The bookshelf.
The desk.
The window.
Nothing had moved.
Then she looked beneath the bed.
There was nothing there.
Almost.
She knelt.
A tiny piece of black foam had caught against the wooden frame.
No larger than her thumbnail.
She carefully lifted it with tweezers.
The texture felt familiar.
Not from a household object.
From something technical.
Something designed to reduce vibration.
Or...
sound.
She slipped it into an evidence bag.
Another small piece.
Still not enough to win.
Enough to continue.
As she stood to leave—
her phone buzzed.
Unknown number.
She answered.
Neither person spoke.
Five seconds.
Ten.
Then...
a man's calm voice.
"You should stop looking at him."
"Han Do-jin?"
A quiet chuckle.
"So you've learned his name."
"Who are you?"
"Someone trying to save your life."
She remained silent.
The voice continued.
"The closer you get to him..."
A pause.
"...the farther you get from the truth."
The call ended.
Seo Hae-in looked at the evidence bag in her hand.
Then at the empty bedroom.
The voice wanted her focused on Han Do-jin.
Which meant one of two things.
Either Han Do-jin was exactly who she was looking for...
Or someone wanted her to believe he was.
For the first time since taking the case—
Seo Hae-in questioned not the evidence...
But the direction it was leading her.
Outside, thunder rolled across the city.
The storm had finally arrived.
End of Chapter 17