Because local police are unable to solve the mysterious murders of seven young women in a small village, Inspector Doren (Adrian Hoven) of INTERPOL is assigned to the case. As a result of a talk with an old witch, the inspector begins to suspect that the killings are the work of a vampire. He learns more from some of the villagers, who link the murders to caves under an ancient castle where Professor Adelsberg and his secretary, Karin (Karin Field), are conducting scientific experiments. After tracking the professor to his underground headquarters, Doren finds the seven living dead and discovers that Adelsberg is the vampire. Karin is to be his next victim. With the help of the witch, Doren is able to save Karin and kill Adelsberg by driving a stake through his heart.