Plot
Margot and her cameraman friend Chris want to make a documentary about Margot's past. Her mother, Sarah, abandoned her outside a hospital, and she wonders what drove Sarah to make such a decision. Through a genetics site, she and Chris meet her blood relative Samuel, who is an Amish currently going through his rumspringa. The team is joined by Dale, their documentary's soundman. Samuel leads them to Beiler Farm, where he and Margot's mother came from.
Jacob, the patriarch of the commune and Sarah's father and Margot's grandfather, welcomes the team, and they find lodging. Strange events occur; Margot finds a little girl brushing her doll's hair in the barn. The doll is named Sarah, and the girl cryptically says that Sarah is "still there." Margot later hears sounds from her mother's old room and sees a spirit.
The group interviews Jacob. He tells them about the free-spirited Sarah, who defied their practices by sleeping with a boy and getting pregnant. Instead of being forced to give up Margot to an adoptive family, Sarah instead left her at a hospital before disappearing, and is now presumed dead. Margot's team finds a church that Jacob prevents them from entering. That night, the team follow a group of commune residents to the barn, and covertly observe a strange ritual in which a newborn two-headed goat is sacrificed.
Determined to find out the commune's secrets, Margot and Chris break into the church. They discover paintings depicting the demonic figure Asmodeus, as well as a deep pit. Margot sneaks into Jacob's room the next day, where she finds a hidden laptop and discovers that he and Samuel had already known about her being Sarah's daughter and had orchestrated her arrival. A ghoulish being attacks Margot that night. The next day, Chris and Dale find her catatonic with her sheets soaked with blood.
Chris and Dale hitch a ride into town to buy a replacement battery for their car, and are informed by the mailman that the people at Beiler Farm are not Amish. After researching on the Internet, they learn that according to myth, the Norwegian village of Beskytter suffered a massacre believed to be caused by Asmodeus. They trapped the demon inside the body of a woman, and the demon continues to be passed from mother to daughter in the bloodline. Margot is next in line, which is why Sarah sent her away and why she was brought to the settlement.
When Chris and Dale return to the commune, Margot has disappeared. While Dale installs the new car battery so they can escape, Chris enters the church to search for Margot. After encountering and killing Jacob, Chris rescues Margot from the bottom of the pit, but they are pursued by a skeletal creature. The creature kills Dale and pursues Margot and Chris into the barn. Margot, realizing that the creature is Sarah possessed by Asmodeus, calls her by her name, which confuses her. Taking advantage of her mother's weakened state, Margot sends Sarah falling to her death onto a spiked row of farm tools.
Following Sarah's death, Asmodeus is unleashed upon Beiler Farm, causing chaos as the residents turn on one another, and both livestock and homes go up in flames. Margot and Chris escape in their car. Some time later, two police officers arrive on the scene, discover the aftermath of the massacre, and find a demonically-possessed Samuel mimicking a baby's cry. Samuel compels the officers to take their own lives, before he drives away in their car.
