Lee and his wife Susan accept the invitation of mysterious, Diane, to visit her secluded desert estate. Tensions arise when the couple, unaware that Diane is a vampire, realize that they are both objects of the pale temptress seductions.

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 ...