Whilst on vacation in Greece Richard Fountain (Patrick Mower) an Oxford don and the Foreign Secretary's son falls into the evil clutches of Chriseis (Imogen Hassall) leader of a coven of perverted socialites who murder innocent victims in pursuit of their blood.Richard's long absence from Oxford prompts his close friends Tony Seymour fiancee Penelope and Bob Kirby to instigate a search for him.The clues they find take them across the Aegan Sea to Hydra a small island where two men find Richard drugged and unconscious in an old castle. A Pagan orgy is building to a climax as Chriseis is preparing herself for her next victim...After a horrific struggle Chriseis flees her mouth dripping with blood and in a tussle with Kirby falls to her death. Richard is saved and returns to the sheltered life at Oxford but the nightmare is just beginning...the spirit of Chriseis not yet dead!