Chapter 1 - The First Sound

The cool air of the hallway pressed against Mark’s skin as he knelt beside Buster. The golden retriever’s breath was hot and rhythmic against the polished floorboards. Behind the closed white door of the guest bedroom—a room that had remained locked since they signed the lease on the downtown apartment three months ago—a low, rhythmic scraping sound echoed through the wood. Mark adjusted his grip on the smartphone, the LED beam slicing through the darkness, illuminating floating dust motes.
Sarah appeared at the end of the hall, her silhouette sharp against the ambient light of the kitchen. She crossed her arms, her face tight with a mix of exhaustion and rising irritation.
"What on earth are you doing on the floor, Mark?" she asked, her voice sharp enough to cut through the quiet night. "It is past two in the morning. Why are you waking the dog up for this nonsense?"
Mark didn't look back at her. He kept his eyes locked on the white grain of the door. "Keep your voice down, Sarah. Something is in there."
"Nothing is in there," Sarah said, walking closer, her bare feet padding softly on the carpet before hitting the wood. "It’s a vacant storage room. The landlord, Mr. Henderson, said the previous tenant left some boxes behind. That’s all. Now get up."
"Boxes don't breathe, Sarah," Mark whispered, his tone dropping into a hard edge. "Listen to me. Buster wouldn't sit here staring at a blank wall for twenty minutes if there wasn't a living thing on the other side."
Sarah let out a heavy sigh of disbelief, stepping right up beside him. "You’re letting your imagination run wild again. Just like that noise you thought you heard in the walls last week. It’s probably just the old plumbing settling. This building is a century old."
"Old plumbing doesn't scratch in a three-beat pattern," Mark said, turning his head sharply to face her. The pale light of the phone caught the anger in his eyes. "And plumbing doesn't smell like ozone and wet earth. Open your nose. Do you smell that?"
Sarah hesitated, her expression faltering for a fraction of a second as a faint, damp odor drifted from the gap beneath the door. But she quickly masked it with a cynical smile. "It’s mold, Mark. The whole basement level smells like that when it rains. Stop scaring yourself."
"I am not scaring myself," Mark snapped, rising to his feet and towering over her in the cramped corridor. "You refuse to see what’s right in front of us because you’re terrified of rocking the boat. Every single night there’s something new in this apartment, and you pretend it’s normal."
"Because it is normal, you paranoid lunatic!" Sarah fired back, her voice raising in pitch. "You want there to be a mystery because your life is boring! You want a crisis!"
"Quiet!" Mark hissed, grabbing her arm.
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Before Sarah could jerk her arm away, a distinct, heavy thud hit the inside of the door, accompanied by the metallic click of a deadbolt turning from the outside.
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