In 1989 Michigan, a local teenager is killed in what appears to be a Satanic murder, and high school metal band "Dethkrunch" decides to pretend to be Satanists to raise their profile. It's all an innocent enough game until the entire town gets pulled down a dark path where it's unclear what is real. Local Chief of Police Ben Dandridge knows better -- high schoolers can't be capable of this kind of murder -- while Tracy Whitehead, local church organizer, is determined in her mission to save the children from the evil that is waiting to poison them all. Along the way, some are enthralled by it, others are galvanized and a few are truly horrified. The band unknowingly steps into a craze that rocks everyone, even their own parents, to their core.