The Backrooms - UNLEASED

Clark Warne finds it in his basement-a tear in the cinderblock that shouldn't exist. No frame. No handle. Just a shimmering surface that sweats with something that isn't water. When he presses his palm against it, the wall takes his hand. Then his arm. Then everything he is. Three days later, something wearing Clark's face walks out of the basement. It has his voice. His memories. The precise cadence of his laugh.
It knows his therapist's name, his mother's dying words, the shape of his loneliness. But Clark never wore his shirt backwards. Dr. Mary Kline, his therapist of four years, is the only person who notices the gaps. She's also the only person who understands what the entity in Clark's skin wants: to cross into the real world. Permanently. Using a human carrier. Behind the shimmer is a labyrinth of yellow wallpaper and flickering lights-an infinite non-Euclidean space where geometry bends and stolen faces rotate on a creature that has consumed dozens before Clark.
The government team watching from a surveillance van calls them Hollowers. They've been waiting for one to emerge for twenty-two years. Mary volunteers to go in. She tells herself it's strategy. She knows his psychology better than anyone. If the mimicry fails anywhere, it will fail with her. But the entity has been inside Clark for days now. It knows every session. Every silence. Every wound she tried to heal.
And it has a fragment of itself waiting in the dark of her own apartment, attached to the shadow she didn't know she was carrying home. The hollow space remembers what you've forgotten. And it is patient.