Chapter 70 - The Echo from Trench Eleven
The peace lasted exactly seventy-two hours.
On a rainy Tuesday midnight, while Arthur slept in the newly refurbished guest cottage down the ridge, Cassidy sat at her desk in the master bedroom, reviewing the finalized grant proposals for the university seismic project.
The house was warm, the woodstove in the corner crackling with dry alder logs. The storm outside lashed against the double-paned glass of the bedroom window, but the structure felt as solid as a fortress.
On the corner of her desk, the secondary monitoring terminal connected to the deep trench installation suddenly gave a single, low-frequency chime.
Cassidy paused, her pen hovering over the document.
She turned to the monitor. The screen, which had remained in passive diagnostic mode since Donald’s arrest, was flickering with an anomalous data surge.
`DIAGNOSTIC ALERT: SUB-TRENCH SENSOR ARRAY 0-B.`
`DEPTH: -42,000 FEET.`
`SEISMIC ACTIVITY: 0.00.`
`ACOUSTIC FREQUENCY: MODULATED VOICE-BAND TRANSMISSION.`
Cassidy’s heart skipped a beat. Modulated voice-band? At forty-two thousand feet? That was seven miles into the earth's crust—far below the bottom of the drydock chamber she and Arthur had explored, deep within the primary trench formation beneath the ocean bed.
She clicked the audio decode button and pulled on her studio headphones.
The channel opened with a hiss of white noise that sounded like the crushing pressure of deep oceanic water. But beneath the static, there was an unmistakable rhythmic sound: a mechanical respirator cycling air.
And then, a voice broke through the static.
It was not Eleanor. It was not Donald.
It was a deep, gravelly male voice, speaking through an analog military scrambler that the Boreas processor instantly cracked using Cassidy’s biometric deed key.
*"Cassie..."* the voice spoke, using the childhood nickname that only one person had ever called her—a person who had supposedly died in a plane crash over the Gulf of Alaska when she was four years old.
Cassidy froze, her blood turning to ice water in her veins.
*"Cassie, if you're listening to this, Eleanor failed to keep you away from the lower register. Good girl. You always were smarter than Donald."*
A heavy metallic click echoed over the line, followed by the distant rumble of deep sub-oceanic machinery.
*"The mortgage you paid wasn't for the house, Cassie. It was keeping the air flowing to Trench Eleven. I’m running out of emergency reserves down here. Eleanor thought she locked me in. Don't look for the police, Cassie. They don't have the clearance. Take the second key from my safe... and come get your father."*
The terminal abruptly screeched as the transmission cut off, replaced by a flashing red prompt in the center of the display:
`TRENCH ELEVEN: LIFE SUPPORT CRITICAL.`
`OXYGEN EXPIRATION COUNTDOWN: 47 HOURS, 59 MINUTES.`
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`ENTER KEY TO COMMENCE DEEP SHAFT PURGE.`
Cassidy tore off the headphones, her chest heaving, staring at the screen as a violent crack of thunder shook the house on Ridge Road to its very foundations.
