Two brothers, reunited for their father's funeral, stumble upon the entrance to a nearby cave, where they are slowly forced to confront the true, nightmarish cause of their father's death.
As an evil takes over the world beyond their front doorstep, the only protection for a mother and her twin sons is their house and their family’s protective bond.
Still reeling from the tragic death of their mother, a teenage girl and her younger sister find themselves plagued by a sadistic presence in their house and struggle to get their grieving father to pay attention before it’s too late.
Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.
An orphaned girl is rescued from a satanic ritual and taken to Saint Catherine Institute for homeless youth. There she will learn new skills while facing demons that stalk her.