On a secluded farm in a nondescript rural town, a man is slowly dying. His family gathers to mourn, and soon a darkness grows, marked by waking nightmares and a growing sense that something evil is taking over the family.

Jack Harriman becomes a spiritual celebrity after debunking Reverend Guy Roy on a public-access TV show. While on the road speaking his brand of truth, forces natural and supernatural lead him to question whether he has a deeper calling.