A young woman must save herself and her friends from an ancient evil that stalks its victims through the real-life phenomenon of sleep paralysis.

When a local man's corpse appears on a nearby hillside, no one is quite sure what happened to him. Many of the town's residents secretly wonder if they are responsible, including the man's ex-wife, Jennifer, and Capt. Albert Wiles, a retired seaman who was hunting in the woods where the body was found. As the no-nonsense sheriff gets involved and local artist Sam Marlowe offers his help, the community slowly unravels the mystery.