Lee Van Cleef stars as McClain, a ruthless and savage outlaw who heads a posse of murderers and thieves. After witnessing the murder of his parents and kidnap of his sister by the criminal gang, a young boy (Leif Garrett) embarks on a personal vendetta to rescue his sister and avenge his parents deaths. With the help of a prospector called Isaac, another victim of McClain's posse, the two form an unstoppable alliance that will bring death to those responsible.
