Film • Aug 11, 1971
A biker gang visits a monastery and discovers black-robed monks worshiping Satan. When the monks attempt to make Helen, one of the female bikers, a satanic sacrifice, the gang destroys the monastery and departs. However, their actions have unintended consequences, as Helen becomes possessed by the satanic rituals and transforms into a werewolf at night, leading to dire consequences for the bikers.
