He made the decision at 1128, with nineteen minutes left on the master key window.
Not because it was the cleanest option. It wasn't. Not because the risk was manageable. It was. The decision came because Ryu had said Shin wanted them doing something useful, and the only option that produced any movement in the next hour was the one that sent Park Hyun-ah running.
Learning who held the master key was a longer game. It would matter. But not in the next fifty-eight hours.
"Message is ready," Na-young said.
She'd built it from the fourteen communications Park had sent, mapped the language pattern, pulled two phrases that appeared in multiple messages and were therefore presumably handler-standard. Short. Imperative. No explanation.
`OPERATION COMPROMISED AT YOUR LEVEL. EXECUTE PROTOCOL TWELVE IMMEDIATELY. DO NOT USE FACILITY INFRASTRUCTURE. SECONDARY EXIT ONLY.`
"Protocol twelve?" Caden asked.
"Standard abort-and-evacuate code in Hunt's own emergency system," Min said. "Section 9 would have given her the same codes. Familiar format. She won't question it."
"She'll run."
"She'll run or she'll freeze, and either one creates a gap in their eyes-and-ears coverage inside Sector 5 for at least an hour. [Audio Sense] at active range is personal-proximity skill—she can't hear what she can't physically reach."
Caden looked at the notepad.
The message was right. The timing was right. The math said eighteen minutes.
"If Epsilon's intrusion detection is running," he said, "the injection flags the moment it hits the ghost node."
"Yes."
"They'll know someone used a derived session key. They'll know the key derivation. They'll rotate everything."
"Yes."
He looked at Kane.
Kane said nothing. But he'd moved to the edge of the conveyor, which was as close as he came to leaning in.
Caden put both hands flat on Na-young's laptop table, closed his eyes, and let [Comm Spoof] reach through the relay architecture he'd memorized from the ghost node.
The skill found the traffic stream the way you found a familiar sound in a crowded room. Not sight. Something more like pattern recognition that lived in the chest rather than the head.
He matched the session key to the current timestamp. Validated the derivation.
Then he injected the message.
Four hundred milliseconds of active transmission.
Done.
He opened his eyes.
Na-young was watching her screen. "I can't confirm receipt from here. We need eyes near Sector 5's secondary exits."
"Marcus," Min said.
She was already typing.
---
Marcus had eyes near Sector 5 because Marcus always had eyes near places that mattered, and he never explained how.
His response came in eleven minutes.
*Officer exited secondary service entrance at 1143. Standard uniform, carry bag, no tactical equipment. She stopped at the corner and checked her phone twice in forty seconds. Then walked south at irregular pace—not running but the walk of someone who wants to run. She took the long route around the parking structure instead of through it.*
*She did not take a direct path to any transport hub. She made two turns that had no navigational logic. Then she entered a residential building on Buseok-ro and has not exited.*
Na-young read it aloud. When she finished, the room was quiet.
"That's not running to Section 9," Vera said.
"No. That's running from everyone." Min looked at Kane. "She knows she's exposed but she doesn't know which direction the exposure came from."
"Which means for now she's out of play on both sides," Ryu said. "Gap is real."
The gap was real. And it had cost exactly what Caden had predicted it would cost.
Marcus's second message arrived eight minutes later.
*Interesting timing. Within six minutes of the officer's exit, a transit vehicle departed Sector 5's secure vehicle bay under a standard transfer-of-custody manifest—prisoner transport classification. Manifest destination: Hunt Central Administrative Archive, Namsan.*
*Hunt Central Administrative Archive does not have medical facilities. Hunt Central Administrative Archive does have a subterranean-level annex that does not appear in any current floor plan but that I have very strong opinions about.*
*Also: Ghost node at Sector 5 has been flagged inactive by grid maintenance. Someone just pulled the plug on the relay. You probably already know what that means.*
Caden knew what it meant. The injection had flagged. Epsilon had burned the ghost node and rotated their authentication tree. Every derived key he'd built was now stale.
He sat with that for a moment.
Three months of being able to use [Comm Spoof] without Epsilon knowing it existed. Gone in four hundred milliseconds.
They would be watching for it now. Every Section 9 comm channel would have anomaly detection tuned specifically to derived-key injection attacks.
"You've done it," Vera said. She wasn't angry. Just noting the ledger entry.
"I know."
"We won't be able to use that approach again."
"I know."
"Was it worth it?"
He looked at Marcus's message. Transfer vehicle. Namsan subterranean annex. Departure within six minutes of Park's exit, which meant the transfer had probably been staged and they'd been watching for any coverage gap.
Section 9 hadn't been storing Shin at Sector 5. They'd been using Sector 5's infrastructure as a holding point while they arranged a deeper relocation. The gap Caden had created by spoofing Park's message had accelerated their timeline.
"We got her location," he said. "Namsan annex. Before, we had a 72-hour window and didn't know where she was. Now we have roughly fifty hours and we know where she's going."
"You accelerated their transfer," Ryu said.
"I did."
"So we now have to move faster than they were already moving."
"Also yes."
Ryu was quiet for a moment.
"Okay," he said.
"Okay?"
"You made a call. It moved the situation. We work with it." He looked at Min. "What is Namsan annex?"
Min was already on her own phone. "Hunt Central Administrative Archive is official record storage. Public access during business hours. The annex—" She paused over something. "There's no annex in the public building registry."
"Marcus believes it exists," Kane said.
"Marcus believes many things and is right more often than he should be." Min kept scrolling. "If Section 9 is using unregistered subterranean space inside a public archive building, the entrances would be through service access. Loading dock access, utility tunnel connection, or—" She stopped. "There is a Hunt-contracted infrastructure maintenance file for Namsan area from three years ago. Electrical and data systems upgrade. The contractor was a shell company." She looked up. "Registered to an address that Na-young pulled from the Gyeonggi data drive. Same routing code."
Na-young pulled her own drive records. Cross-referenced. Nodded once.
"Same Section 9 shell company used for infrastructure contracts at two other facilities," she said. "They built their own subterranean network inside public buildings on their own contracts. Nobody questioned the job scope because it went through legitimate Hunt procurement."
"Permissions," Caden said.
"Permissions," Min confirmed.
Kane stood very still.
"So they have a private detention facility inside a public building, built with government funding, running under cover of an official archive." He set his phone down. "And they have been moving Shin there because official Hunt detention infrastructure has oversight mechanisms that their private space does not."
"Once she's in the annex," Caden said, "the EC tag and the prisoner transfer manifest will route her into Section 9's system. From there she is functionally invisible."
"How long until the transfer vehicle arrives at Namsan?" Ryu asked.
"Transit time from Sector 5 is twenty to thirty minutes," Min said. "She's already there, or nearly."
Nobody moved for a moment.
"She was always going there," Vera said. "The Sector 5 holding was temporary. We accelerated the transfer by minutes, not hours."
She was probably right. Caden ran it back. The staging. The transfer vehicle ready to move within minutes of the coverage gap. That wasn't a reactive relocation. That was a scheduled move with a trigger condition.
He'd just been the trigger.
"This is still usable," he said.
"Explain," Kane said.
"Section 9 built a private detention space inside a public archive. Which means the public archive's physical access points are the only routes to the annex. Which means if we need to get inside—"
"We go in through the archive."
"We go in through the archive."
Kane sat down for the first time since the container yard.
"A public building with civilian foot traffic," he said. "Regular operating hours. No Hunt presence on site during public hours except archive security."
"Which is not Epsilon," Min said slowly. "Archive security is contracted civilian."
"And during public hours," Na-young said, "the building processes researchers and records requests. People come and go. People use service corridors to return physical files from off-site storage."
Ryu said, "Maintenance IDs."
"Better," Caden said. "Records transfer. People moving physical file boxes don't get looked at closely. They get doors held for them."
"We'd need a records transfer request that looks legitimate," Min said.
"And a van that matches a records contractor," Vera added.
"And a way into the annex from the archive service level once we're inside," Kane said. "We do not know the layout of the annex."
"We know it exists. We know the infrastructure contractor used Section 9 shell routing codes. We know the electrical work covered it." Caden looked at Na-young. "The contractor's work order would have included floor plans for permit filing. Even if the shell company, the filing had to match the real structure."
Na-young said, "Permit filings are public record."
"Give me those permit filings and I can work out the annex layout from the electrical routing," Caden said.
She was already pulling the city construction permit database.
Kane said, "You have laid out the early shape of a plan."
"I've laid out the early shape of a terrible plan," Caden said. "But the bones are there. Two or three things go right and Shin walks out of that building inside a records box."
He looked at the wall.
He did not look at Min's screen where the fabricated confession was still paused at Shin's last frame: hands folded on the white table, left eye bruising, the very careful words of someone protecting everyone else while in the room they put her in.
He counted skills instead.
[Skill Theft]. [Pain Resistance]. [Ground Sense]. [Comm Spoof].
[Comm Spoof] was half burned. One injection had made it visible to Epsilon. It wasn't gone, but using it again would light him up on every Section 9 monitor in range.
The hand was different now. Still playable. Different risk profile.
"Na-young," he said.
"Already on the permits," she said.
"Ryu."
"Van," he said. "Records contractor. Already making calls."
Nobody asked him to connect the dots before moving. Just started moving.
He hoped it would.
Fifty-one hours and change until Shin's window closed.
They had bones. They needed a body.
He pulled his chair closer to the evidence table and started building.
