On their way to a family get-together, the Herring family are in a bad car accident, waking in a terrifying, dark basement. Something is there with them. Caged. And it craves human flesh. With a mysterious overseer aiding the creature like a pet, the family must work together to find a way to defeat them both and make their escape.

Based on True Events: Suffering from sleep paralysis, a medical student falls prey to a demonic force that wants to rip her apart from within. Torn between sanity and the unknown, she's left with no alternative but to contact a local priest for help.