A hitchhiker named Martel Gordone gets in a fight with two bikers over a prostitute, and one of the bikers is killed. Gordone is arrested and sent to prison, where he joins the prison's boxing team in an effort to secure an early parole and to establish his dominance over the prison's toughest gang.

An ex-con, on parole and trying to straighten his life out, decides to resume his boxing career when one of his prison enemies escapes and kills his girlfriend.