A biker gang visits a monastery where they encounter black-robed monks engaged in worshipping Satan. When the monks try to persuade one of the female bikers, Helen, to become a satanic sacrifice the bikers smash up the monastery and leave. The monks have the last laugh, though, as Helen, as a result of the satanic rituals, is now possessed and at night changes into a werewolf, with dire results for the biker gang.
A married couple accept the invitation of mysterious vixen Diane LeFanu to visit her in her secluded desert estate. Tensions arise when the couple, unaware at first that Diane is a centuries-old vampire, realize that they are both objects of the pale temptress' seductions.
Angel (William Smith), an outlaw biker, sells out his gang by exposing their wild conquests to Like magazine for $10,000. With his photo on the cover, Angel skips town and tries to start over with help from sheep rancher Dan Felton (Dan Kemp). An ex-motorcycle enthusiast, Dan becomes a mentor to Angel, giving him hope for a peaceful future. But Angel must put hope aside when members of his former gang viciously attack Dan's teenage daughter.
