Can simply bringing a young man to church incur the wrath of Satan? Although she believes in God, Joanna Sutton refuses to admit Satan exists until she begins to experience things he seems to be doing. Ball lightning hits her house, a demon appears at her doorstep, she falls asleep while driving and a benevolent ghost encourages her to open a small unused building behind the house she is renting. When the ghost disappears and she realizes that he not just a friendly neighbor, she calls Father Michael, the priest at her church. He helps her open the building and they find a tiny human skeleton inside. Father Michael and Joanna have a long talk, and she finally realizes that Satan is at work in her town and will try to destroy her and those she loves. Together they make plans to fight back.