Three deranged motorcyclists are riding along the deserted roads of the West, beating and raping the people they meet. Cory Maddox, a veterinarian whose wife was brutally raped by a gang of deranged bikers, tries to catch the bastards in order to take revenge or at least turn them in to the police. On the way he meets Ruby Bonner, her husband was killed by the same gang. Ruby and Cory go on a chase together and get trapped in a canyon, where they get into a brutal fight with the gang leader, who turns out to be an embittered and finally crazy Vietnam War veteran.