Just as Marcus reached for the brass door handle, Duke trotted into the hallway, lowered his snout to the floorboards, and let out a low, distressed whine. Evelyn and Marcus both froze. Beneath their feet, a subtle, rhythmic vibration pulsed through the cabin’s wooden foundation. It was faint—almost imperceptible—like the steady thrum of an idling engine buried deep beneath the earth.
"Thermal contraction," Marcus asserted quickly, though his eyes darted toward the floorboards. "The bedrock shifts under the cabin foundation during sudden temperature drops. It happens every winter out here." Evelyn wasn't convinced. The pulse felt too strong to simply be ice expanding in soil.
After Marcus drove away, Evelyn tried to settle down. But thirty minutes later, the lights flickered violently and died, plunging the house into pitch blackness. She lit an oil lantern with shaking hands. Walking to the front window, she noticed a blurred, uneven smudge in the frost on the exterior pane—a shape that almost looked like a handprint, though it could easily have been melted ice.