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 detective duo hunts a criminal organization, which is using an unknown liquid explosive material.
Greene plays an up and coming boxer with a powerful right hand and a heart of gold. He works night shifts in a bar and has a girlfriend whose father played by Ernest Borgnine disapproves of the relationship thinking Greene is a no good for nothing loser. To prove himself Greene catches the attention of a local boxing promoter played by Giuliano Gemma who decides to make a champion out of his newfound protégé.
