The Zarbo brothers are seasoned outlaws with a reputation for killing. Wanted in two states, they set their sights on Colorado and a string of bank robberies. They don't count on running into Chief U.S. Marshal John Brockman. John arrests Lee Zarbo, but his brothers remain in hiding. Lee's sentence of death by hanging incites them to desperate measures. They'll do anything to get him out alive, Even kidnap the Chief U.S. Marshal's daughter.