Chapter 5 - The Locked Front Door

The violent rattling of the front door echoed through the quiet house like a series of rapid gunshots. Mark froze with his hand on the banister, torn between investigating the heavy footsteps above them and securing the main entryway. Sarah pulled Lily tighter against her hip, her breathing coming in sharp, shallow gasps as her eyes darted from the dark staircase to the front foyer.
"Is someone out there?" Sarah called out, her voice cracking slightly despite her attempt to sound authoritative. "We have a security system! The police have already been notified!"
The rattling stopped instantly, replaced by a profound, suffocating silence. No footsteps answered from upstairs. No further noise came from the heavy oak door. Mark exhaled a shaky breath, releasing his grip on the banister, and began walking briskly toward the foyer with Sarah and Lily trailing closely behind him. Every shadow in the hallway seemed to stretch and distort under the flickering porch light visible through the frosted glass panels of the door.
Mark reached out, flipped the deadbolt with a metallic click, and pulled the heavy door wide open.
The porch was completely empty. The cold night air rushed in, carrying the scent of damp earth and decaying autumn leaves from the front yard. The driveway was bathed in the pale, sterile light of the streetlamp at the edge of the property, revealing their sedan parked neatly in its usual spot. There were no footprints in the light dusting of frost on the welcome mat, no cars idling at the curb, and no sign of any human presence anywhere near the house.
"There's nobody here," Mark muttered, stepping out onto the porch to scan the dark treeline bordering their suburban neighborhood.
"Daddy, look at the welcome mat," Lily whispered softly from behind him.
Mark looked down. Resting squarely in the center of the frosted coir mat was a small, damp pair of vintage white leather children's shoes—the exact same shoes worn by the duplicate girl on the basement security monitor just moments ago. The leather was freezing cold to the touch, and small droplets of dark, stagnant water pooled inside the soles, smelling faintly of old river mud and rust.
Sarah gasped, dropping to her knees to inspect the shoes before recoiling as if she had touched a hot stove. "Mark... how did these get here? We checked the porch less than a minute ago!"
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Before Mark could answer, the heavy front door behind them slammed shut of its own accord with a deafening crash, the automatic deadbolt sliding home with a heavy metallic click, locking them out in the cold.
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