In 1830, forty years to the day since the last manifestation of their dreaded vampirism, the Karnstein heirs use the blood of an innocent to bring forth the evil that is the beautiful Mircalla (YUTTE-STENSGAARD). The nearby Finishing School offers rich pickings not only in the blood of nubile young ladies but also with the headmaster (RALPH BATES) who is desperate to become Mircalla's disciple.
As students in the school, inhabitants of the nearby village, and those who suspect Mircalla start to die, suspicion turns towards the Karnsteins and their ominous castle. A visiting author, Richard Lestrange (MICHAEL JOHNSON), instantly falls for her seductive yet lethal charms; and must save her from the wrath of his fellow villagers whilst protecting himself against her deadly kiss.