At 8:57 p.m., a wealthy hotel owner watched his three-year-old son shatter a porcelain plate in the middle of The Glass House

"Vance!" Matthew barked, raising his flashlight as he rushed up the narrow stone steps. He threw his shoulder against the indigo wood. The door didn't budge; heavy iron plating reinforced the interior frame.

From the other side of the door came the muffled sound of a struggle—a dull thud, followed by the heavy splash of someone falling into the wet mud outside.

"Vance!" Matthew called out again, slamming his hand against the oak panel.

"He won't answer," a coarse, unfamiliar voice echoed through a small brass ventilation grate set near the ceiling of the stairwell. "Your security chief was thorough, Mr. Brooks, but he wasn't looking behind him."

Claire joined Matthew on the stairs, her pulse racing. "Who are you? What do you want?"

"Anne Bennett was supposed to stay dead," the voice replied through the grate. "She made a deal eleven years ago: her silence in exchange for your quiet life in Washington. But then Ellen started digging into those old shipping manifests. She found Anne. And now, you’ve brought Mr. Brooks right to the evidence."

A sharp, pungent smell began to seep through the brass vent. Matthew sniffed the air, his expression instantly shifting to pure alarm. "Kerosene."

"You have five minutes before the floorboards upstairs burn through," the voice sneered. "Consider it a cleanup operation."

Footsteps hurried away through the mud outside, followed by the roar of an accelerating engine. Seconds later, a bright orange glow flickered through the cracks in the wooden doorframe. The heat began to rise instantly as flames caught the dry pine siding of the garage above.

"Get back down!" Matthew ordered, grabbing Claire’s arm and pulling her down the stairs as smoke began to pour through the ventilation shaft.

"We're trapped!" Claire coughed, waving her hand through the gathering haze. "There are no other doors!"

"There's always another way out of a reinforced shelter," Matthew said, his voice terrifyingly calm despite the smoke filling the room. He swept his flashlight across the brick walls, searching the perimeter. "Look at the blueprints on the desk! Your mother was an archivist for my father’s shipping firm. She designed secure storage spaces!"

Claire ran to the oak desk, her eyes watering from the acrid fumes creeping down the stairwell. She snatched the rolled-up blueprint for the cottage, spreading it flat across the dust-covered surface. Her fingers traced the white lines in the dim light of Matthew's flashlight.

"Here!" she pointed to a cross-section of the basement foundation. "The north wall—there’s a coal chute that leads out beneath the back porch!"

Matthew rushed to the north wall, pushing aside a steel shelving unit loaded with empty glass canning jars. The jars shattered on the concrete floor, revealing a small, rusted iron hatch buried near the baseboard, secured by two sliding bolts.

"Help me with this!" Matthew commanded, setting his shoulder against the iron plate.

The heat from the stairwell was becoming unbearable. Overhead, the wooden joists creaked and popped as the garage collapsed into a inferno. Sparks rained down the stone steps. Claire grabbed a heavy brass bookend from the desk and began pounding wildly at the top sliding bolt, knocking away decades of rust until the latch finally slid free.

Together, they heaved the heavy hatch open. A rush of cold, wet night air blew inward, cutting through the dense smoke.

"Go! Crawl through!" Matthew pushed Claire toward the narrow shaft.

Claire dragged herself through the damp, narrow concrete tunnel, scraping her knees and elbows against the rough stone until her hands broke through into the wet grass beneath the back porch. She scrambled out into the downpour, turning around immediately to reach into the dark chute.

"Matthew! Give me your hand!"

Matthew squeezed his broad frame through the narrow opening, gasping for air as he pulled himself out into the mud beside her. Behind them, the garage erupted into a towering column of fire, lighting up the midnight sky in brilliant shades of yellow and red.

In the distance, sirening ambulances and police cars wailed through the quiet streets of Alexandria.

Claire lay in the wet grass, staring at the burning structure. In her jacket pocket, her fingers clutched the single letter her mother had left behind.

Matthew stood up, wiping soot from his face. His eyes were cold as ice as he looked down at her. "Vance is gone. My SUV is gone. They took the evidence they came for, but they missed one thing."

Claire looked up at him. "What?"

Matthew held up his hand. Between his fingers sat a small, encrypted flash drive he had snatched from the desk drawer right before the fire broke out. "Your mother kept a digital duplicate. And there’s only one place in the city with the cryptographic key to open it."