High school student Billy Colton (Derek Rydall) is spying on his attractive new neighbor (Shannon Tweed) when he witnesses her being murdered by a man in a robe, and he recognizes the man as his unpopular history teacher Zachary Willard (Allen Garfield). Because he has a history of pranks and conflict with Willard, the police do not believe him. Threatened by Willard and his deranged brother Stanley (Michael J. Pollard), who are cultists and serial murderers, Billy convinces retired investigator Ronald 'Ron' Devereaux (Elliott Gould) to help him find hard evidence.