In the high-altitude isolation of the Adirondacks, a group of friends arrives at the mountain-top estate of the late, legendary avant-garde filmmaker Pengin Thesk. Among them is Jax, a man haunted by his father's legacy in the film industry, and Lena, a brilliant civil engineer who views the world through the cold lens of structural logic. Jax regales the group with the legend of Thesk - a man rumored to have discovered a way to "bleed" reality into celluloid.
The horror begins with a Cold Open in the estate's private screening room. As an old 70mm projector flickers to life, the front door of the mansion literally vanishes from existence - a physical "edit" that traps them inside. They soon discover the house is a living soundstage governed by the laws of cinema rather than physics. In the Foley Room, their own screams are heard from the future before they are uttered; in the Jump-Cut Gallery, the Editor separates the group across non-linear space. They realize they are being "filmed" by the house itself, which is attempting to finish Thesk's uncompleted 1984 masterpiece.
As the survivors descend into the Negative Zone of the basement, colors invert, and shadows take on physical weight. The group's "Influencer," Chloe, uses her digital filters to "re-grade" reality, allowing them to hide from the Editor's gaze. However, the house becomes increasingly aggressive. During the Assembly Cut, a character's shadow is "clipped" by a jagged edit, causing a permanent physical injury in the real world.
Jax begins to hear the Director's Commentary - the disembodied voice of Thesk - whispering instructions into his mind. Lena counters this madness with "Structural Logic," discovering that by moving objects while the house isn't "looking," she can create Continuity Errors that reset time and space. They eventually find the Deleted Scenes, a horrific chamber where the original 1984 film crew is preserved in flickering celluloid stasis, neither alive nor dead.
The survivors reach the Red Light District, a toxic, vinegar-smelling darkroom at the heart of the estate. Here, the Editor triggers the Final Girl Protocol, isolating Lena for a scripted climax designed to make her the lone survivor. Jax reaches the Director's Chair and faces a choice: complete the "Masterpiece" to achieve artistic immortality or sabotage the Master Print - the original 1984 reel that serves as the house's memory.
In a desperate Fade to Black, Jax and Lena destroy the reel as the house begins to "de-render" into white noise. They escape the mountain, but the world they return to is no longer the one they left. They are now "Outtakes" - living, breathing remnants of a film that was never meant to end.
