Visiting Morocco, Paul Carver attends a party given by archeologist Gunther. There he meets the beautiful Chantal and the mysterious Marisa, who lures Carver to an ancient palace where she is suddenly seen in colorful surroundings lying on a divan. Marisa tells him that he is among the 'Servants of the Night'. The following day Gunther's assistant discovers an ancient tomb, bearing the seal of a vampire ...