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.

After dying in a car crash, Bobby Fantana is forced to pay for his misdeeds by becoming someone's guardian angel. He reluctantly agrees to watch over awkward high schooler Lenny Barnes, teaching him how to be cool and confident. As Bobby teaches Lenny, the two form a close bond.