Chapter 6
Before Lin could open the ledger to examine the first page, a low, metallic thud resonated through the floorboards beneath their feet. It wasn't the sound of the building settling; it was a rhythmic vibration, traveling up through the steel-reinforced concrete pillars of the high-rise. Jin-woo immediately dropped into a low crouch, his hand instinctively resting on the service holster beneath his dark jacket.
“That’s not maintenance,” Jin-woo whispered sharply. “That’s hydraulic pressure. Someone is operating the service elevator on the maintenance bypass.”
Chen’s eyes widened, the first true flash of panic breaking through her stoic armor. She stepped back toward the bedroom door, her heels clicking sharply against the wood. “They found the frequency. They know the ledger is out of the wall.”
“How?” Lin demanded, keeping her voice controlled as she slipped the leather ledger into a specialized evidence pouch she carried in her coat. “We disabled our comms. No signals left this apartment.”
“The ventilation grid,” Chen said, her breath catching in her throat. “There are vibration sensors in the metal lining. Any change in air pressure or weight distribution in the ceiling cavity triggers a silent alert at the basement security desk. A desk that hasn't belonged to the building management in over a year.”
Lin didn't waste time debating logistics. She drew her service pistol with fluid, restrained motion, clicking off the safety without making a sound. She motioned for Jin-woo to secure the perimeter near the entrance while she covered the hallway. The hallway stretched out before them like a white tunnel, bathed in the graying light of the late afternoon.
“We need to move,” Lin said, her voice dropping to a command level. “Now.”
“There is nowhere to go,” Chen replied, her composure returning as she realized the futility of running. She stood straight, her hands smoothing her white skirt with tragic dignity. “The service stairs are monitored by facial recognition cameras linked to the same private network. If we step into the stairwell, we’re silhouettes on a monitor before we reach the thirteenth floor.”
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“Then we don't use the stairs,” Jin-woo said from the entryway, his eyes fixed on the smart lock of the front door. The indicator light, usually a steady blue, had just flicked to a pulsing amber. Someone was attempting an electronic override from the outside hallway, feeding a master frequency into the deadbolt mechanism.
The electronic lock beeped softly—a single, fatal tone.
