Chapter 66 - Beneath the Submerged Keel

The water of Lake Tahoe in November was an immediate shock to the nervous system, hovering barely above thirty-four degrees. Even through the specialized thermal drysuit, the cold pressed against my skin like an iron vice.
Miller and I descended into the abyssal murk beneath the boathouse dock. Twin beams from our tactical diving lights cut through the crystalline water, illuminating massive granite boulders that fell away into sheer vertical drop-offs.
At thirty feet, the timber supports of the private pier gave way to massive, pre-cast concrete caissons. On paper, these caissons had been poured to stabilize the villa's cantilevered deck.
As I swept my light across the base of the central caisson at forty-five feet depth, the beam caught the unnatural sheen of oxidized marine alloy.
"Marcus, look at this," Miller’s voice crackled through the full-face comms mask.
Set directly into the lake floor beneath the concrete foundation was an industrial titanium hatch, six feet in diameter, covered in artificial ballast stone to disguise it from surface sonar. A heavy hydraulic locking wheel sat dead center, coated in anti-fouling marine grease.
This wasn't an emergency drainage vault. It was a wet-dock lockout chamber.
My father hadn't just stolen my money and given my villa to Clara; he had allowed Apex to turn the substructure of my estate into an unmonitored drop point for illicit high-altitude cargo—smuggled across international airspace and dropped into the deep waters of Tahoe where Coast Guard jurisdiction didn't routinely operate.
Suddenly, a blinding glare cut through the water from the deep trench thirty yards out.
A low, vibrating hum rattled my sternum. The water temperature around us seemed to drop as twin hydro-jets churned the silt off the shelf. Out of the darkness emerged a sleek, matte-black mini-submersible, its robotic manipulator arms extended, hydraulic claws gleaming in the glare of its high-intensity xenon floods.
"Contact!" Miller yelled over the comms. "It’s a manta-class combat diver rig!"
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The submersible didn't deploy torpedoes; it fired a pressurized speargun array designed for underwater hull breaching. A heavy steel penetrator slammed into the concrete caisson inches from my helmet, kicking up a blinding cloud of pulverized mortar and rock.
The mini-sub tilted its thrusters, accelerating directly toward us to pin us against the foundation wall.