Margot, a young filmmaker abandoned by her mother as an infant, decides to investigate her past and uncover the truth about her biological family. Accompanied by her cameraman Dale and sound recordist Chris, Margot travels to a remote Amish-style community in rural Pennsylvania, where her mother’s relatives—the Beilers—reside. Upon arrival, they are greeted by Jacob, Margot’s estranged uncle, who reluctantly welcomes them. While the community appears peaceful and deeply traditional, the
documentary crew quickly senses an undercurrent of eerie hostility and strict isolationism, particularly regarding a locked church on the property and a strict prohibition against using modern technology in certain areas.As the days progress, Margot’s team captures strange nocturnal occurrences. Dale investigates mysterious sounds and discovers disturbing symbols and ritualistic objects hidden away. Tension escalates when Samuel, a young local, acts increasingly erratically, warning them to leave. Margot experiences vivid, terrifying nightmares and begins to uncover the horrifying truth: her mother didn't abandon her out of cruelty, but fled to save her from the family's dark legacy. The Beilers are not actually Amish, but rather members of a sinister, secretive cult worshipping Asmodeus, a malevolent demon. They have long practiced
demonic possession, using a generational bloodline—culminating in Margot herself—as the ultimate earthly vessel for the entity.The situation spirals into a nightmare when Dale is brutally murdered during a night-vision investigation, and Chris goes missing. Realizing the deadly danger, Margot attempts to escape with the help of a sympathetic local teenager, but she is captured by Jacob and the cult elders. During a grotesque, blood-soaked ritual inside the forbidden church, Margot is strapped to an altar as the cult prepares to transfer the demon into her body. Meanwhile, Chris manages to regain consciousness and attempts a desperate rescue, only to be slain by the possessed townspeople.During the ceremony, the demon successfully enters Margot, but the ritual takes a violent turn against the cultists when the possessed Margot turns her supernatural powers on them, slaughtering Jacob and the elders. Hours later, Dale’s girlfriend, Chase, arrives at the compound looking for the missing crew. He is confronted by a heavily armed local police force that has finally responded to the compound, only to witness the terrifying aftermath. The film culminates as the possessed Margot, now completely under Asmodeus's control, walks out of the blood-drenched compound, effortlessly slaughtering the police and effortlessly possessing Samuel, leaving a trail of absolute carnage in her wake.