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.
Steve Oliver
Adam
Donna Anderson
Helen
Gene Shane
Tarot
Billy Gray
Pill
Gray Johnson
Movie
Barry MacGuire
Scarf
Owen Orr
Mouse
Anna Lynn Brown
Shirley
