[Alistair]

The vibration on the acoustic spectrograph flatlined at 03:14:07.

I watched the waveform collapse--the low hum radiating through the suite's western wall dropping from a steady 42Hz to silence in less than a tenth of a second. On the adjacent monitor, Elena's hand was still pressed flat against the concrete, fingers splayed, body motionless.

She hadn't moved. The vibration had been cut at my source--the dampener array I'd activated six minutes ago.

She had been using the Rachmaninoff.

I leaned back and felt something move through my chest. Not anger. Not admiration. Something in the precise borderland between the two--a territory I associated exclusively with Elena Vance.

She had played a flawless Rachmaninoff that made my hands stop moving, my breathing slow to something close to reverence. And while I listened, she'd been using the sustained bass frequencies to drive a resonant signal through concrete, through rebar, through eighteen feet of bedrock--toward the surface.

She had turned my architecture into her transmitter. My prison into her megaphone.

The piano I'd placed as a psychological tool--a gesture designed to communicate refinement, control--had been weaponized against me with an elegance that bordered on poetic.

The dampeners caught it. The signal never reached the surface. But the fact that she'd conceived the plan, identified the transmission path, calculated the resonant frequency to within two hertz, and executed the entire operation while appearing to simply play music--that sat in my stomach like a swallowed stone.

On the live feed, I watched her realize it. A microsecond of stillness. Fingers going rigid. Tendons in her wrist standing taut.

Then her hand dropped. Shoulders drew back. Jaw set in the line I'd cataloged as recalibration--the expression she wore when a hypothesis failed and she was already building the next one.

She didn't scream. Didn't cry. She simply stood there, processing the failure with clinical efficiency.

I closed the spectrograph and opened the environmental control panel.

Time to change the parameters.

She was adapting too fast. Every hour, she gathered data--mapping acoustic signatures, testing thermal gradients, cataloging meal deliveries and light cycles. She was building an internal model that grew more accurate by the day. If I allowed current conditions to continue, she would eventually find a vulnerability I hadn't anticipated.

Not today. Not this week. But she would find it, because that was what Elena Vance did.

She solved systems.

I typed the command sequence. The suite's lighting shifted from its current cycle to total darkness. Zero output. Every LED, every baseboard strip, every indicator light went black simultaneously.

On the thermal feed, Elena registered as a bright orange silhouette against the suddenly cold room. She didn't move for four seconds.

Then she sat down on the mattress with the controlled motion of someone trained to manage their own fear response. Spine straight. Hands on thighs. Breathing descending toward twelve per minute.

She was scared. Heart rate seventy-eight, elevated from her resting baseline of fifty-eight.

But she was managing it. Converting raw fear into actionable information the way a power plant converts heat into electricity.

I retrieved the case I'd prepared three days ago. Silk blindfold. Micro-dose injector loaded with short-acting ether calibrated to her body weight. Soft-leather restraints I'd never intended to use but kept because contingency planning was not optional.