 Raymond is in league with a secret group of Satanists who wish to bring about the resurgence of Zatteen.His associate enigmatic Dr. Walker (Mel Ferrer) reminds him that his girlfriend Barbara Collins can be used as a conduit to distill Zatteen's powers into a corporeal, human form.Her 8-year old daughter Katy has already displayed psychokinetic abilities, and it's the Satanists goal to have Raymond father a male child with Barbara, who in turn will mate with his half-sister and produce the physical embodiment of Zatteen.