In Miami, Florida, biker gang leader Edward "Diablo" Santer is about to be executed for murder when he proclaims his innocence and vows revenge from the grave. When a mysterious biker comes to town during Spring Break festivities, leaving several teenagers electrocuted to death, some begin to suspect that Santer has made good on his promise.

A former robber (whose partner was his father) has reformed and is now running an insurance business with his girlfriend. An ex-partner frames him for a burglary. When his father gets out of prison, they go after the ex-partner.