Varian, under the influence of a love drug, meets a woman named Gwenith from a religious community in a geologically unstable zone. When the others arrive Varian reveals he's about to get married. They soon discover that the community fanatically worships a volcano god called Vatticus, who demands human sacrifices.

• Richard Fielder
• Leonard Katzman
• Bruce Lansbury

• Richard Jaeckel
• Richard Lawson
• Ian McShane