A group of friends search for a young English Oxford student who has disappeared whilst researching in Greece. They are shocked to find that, wherever he has been, certain unsolved murders have taken place. Not believing that their friend could be the perpetrator of such acts, they press on with their search, finding him under the spell of a beautiful Vampire, whose blood-sucking methods include the use of sado-masochism. Believing they have killed her, the group return home, unaware that their friend is now a Vampire.
Patrick Macnee
as Derek Longbow
Edward Woodward
as Dr. Holstrom
Alexander Davion
as Tony Seymore
Peter Cushing
as Dr. Walter Goodrich
Johnny Sekka
as Bob Kirby
Madeleine Hinde
as Penelope
William Mervyn
as Marc Honeydew
Patrick Mower
as Richard Fountain
David Lodge
as Colonel
Imogen Hassall
as Chriseis
Valerie Van Ost
as Don's Wife
Françoise Pascal
as Girl at Orgy (uncredited)
