The air in the subterranean facility was thick with the scent of wet iron, damp concrete, and the acrid stench of terrified animals.

By Saturday evening, a heavy coastal fog had rolled off the bay, wrapping the cliffs of Cohasset in a thick shroud of grey cotton. The security lights around the Cross perimeter hummed quietly, casting wide yellow beams through the mist.

Inside the house, the atmosphere had shifted for the first time in four years.

Lily was sitting at the dining room table. In front of her was a plate containing a full portion of baked chicken and vegetables. She took a small bite, then looked down at Titan, who was resting his huge head on her knee. She broke off a piece of plain chicken and held it out.

Titan took it with incredible gentleness, his lips barely brushing her fingers.

Damien stood by the doorway, watching his daughter eat. His heart felt strangely light, a sensation so unfamiliar it was almost painful.

"She ate the whole thing," Marcus whispered, coming up beside him. "First full meal in three weeks, boss."

"He doesn't leave her side," Damien said quietly. "Not even when she sleeps."

"He's a good dog," Marcus said, looking down at his tablet. "By the way, our street sources are saying the Valentis are stirring up trouble on the north side. They're looking for something that went missing from that auction house. They've been knocking on doors, asking about a heavy gray dog."

Damien’s eyes turned cold as flint. "The Valentis don't set foot in Cohasset. Tell the perimeter guards to double their shifts. Anyone coming within two hundred yards of these gates without authorization gets put on the ground."

"Understood."

Out in the dense pine forest bordering the southern fence line, Clara Mercer was lying flat on a waterproof tarp, tucked beneath a cluster of low-hanging cedar branches. She wore night-vision goggles, through which the high-tech security perimeter of the Cross estate glowed in bright, fluorescent green.

She had spent three hours observing the guard rotations. Damien Cross didn't rely on cheap muscle; his men were former military, moving in paired teams with synchronized radios and thermal imaging gear.

Getting through the fence was impossible without triggering a silent alarm that would have twenty armed men on her position in under ninety seconds.

She didn't need to get through the fence. She just needed to get close enough to send a signal.

Clara pulled a small, silver tube from her pocket—a low-frequency directional strobe light that emitted a light pulse at a precise frequency of 14 Hertz. It was invisible to the human eye under normal conditions, but to a dog conditioned in the Aegis program, it was as bright as a flare in the dark.

She aimed the strobe through a gap in the chain-link fence toward the broad glass terrace of the main house.

Inside, Lily was brushing Titan’s thick fur with a wire brush.

Suddenly, the mastiff’s head snapped up. His ears went fully erect. His broad chest expanded as he let out a low, silent breath, his eyes locking onto the dark treeline past the lawn.

Lily felt the sudden tension in the dog’s body through the hand resting on his back. She looked at him, puzzled.

Titan stood up. He walked to the heavy glass sliding door leading to the terrace and let out a soft, single huff against the glass.

"What is it, boy?" Damien stepped out of the study, his hand instantly drifting to the holster beneath his jacket. He walked over to the glass door and peered out into the grey soup of the fog. He couldn't see anything beyond the green glow of the lawn lights thirty yards away.

Lily reached out and pulled the latch, sliding the heavy glass door open before Damien could stop her.

"Lily, no—" Damien began, reaching for her shoulder.

Before he could grab her, Titan slipped through the gap like a gray shadow. He didn't bark. He didn't run wildly. He trotted with low, lethal purpose straight toward the southern fence line, his nose low to the ground.

"Marcus! Perimeter breach on the south lawn!" Damien roared, drawing his weapon as he stepped out onto the wet stone patio. "Get the lights on!"

Alarm sirens cut through the quiet night, their deep amber pulses illuminating the swirling fog. Armed guards flooded from the side quarters, weapons raised, tactical flashlights cutting beams through the trees.

At the fence line, Clara watched as the massive gray dog emerged from the fog, stopping three feet from where she lay hidden behind the cedar brush.

"Titan," she whispered through the iron mesh, her voice cracking with emotion. "Hey, sweet boy. It's me."

Titan pressed his broad snout against the cold wire. He recognized her instantly. A low, gentle whine—the first sound he had made since entering the Cross estate—escaped his throat. He leaned his massive weight against the fence, his tail giving a single, heavy wag.

"I need to get you out," Clara said quickly, pulling a portable scanner from her kit and pressing it against the fence toward his shoulder. The device beeped softly, displaying a sequence of green code. "The drive is still intact. Thank God."

Suddenly, a bright white light pinned Clara against the dark wood.

"DON'T MOVE! HANDS ON YOUR HEAD!"

A team of three Cross security guards burst through the trees, their rifles aimed squarely at Clara’s chest. Behind them, stepping through the wet grass with calm, terrifying authority, was Damien Cross.