In this biker movie the leather-clad motorcyclists turn into werewolves thanks to a spell cast by a satanist high priest (Severn Darden). Adam (Stephen Oliver) is the leader of a gang called The Devil's Advocates. His girl (D.J. Anderson) receives a request from a cult to offer herself to the Devil. She dances naked with a snake and before long is chomping on lover-boy Adam, which turns him into a werewolf too. The only one who can put an end to the mayhem is Tarot (Duece Barry), a biker with a background in the supernatural. Lots of sex, violence, and wide-open desert highways. The cast includes Barry McGuire, whose hit, "Eve of Destruction," topped the charts in the mid-1960s with its antiwar message.