Salt Flat, Kentucky is a sleepy town until a mysterious tent shows up one day. A charismatic preacher starts inviting people to an old-fashioned tent revival. Everyone is mesmerized by his presence and entranced by the magic he performs.

Sy Sutton isn't fooled by what's going on. But as his son becomes entrenched in the craziness around him, he has no choice but to get involved. With the help of an unlikely friend, he'll try to save his son and the town he's fond of.

Unknown to him, something lurks below. An ancient being with an agenda. When she comes to the surface, all hell will break loose on the night of the Tent Revival.