In 'Dr. Jekyll vs. the Werewolf', Justine (Shirley Corrigan) is the young new wife of a successful businessman Imre Kosta (Jose Marco) who has decided to visit the Hungarian village where he was born (and his parents were murdered) deep in the Carpathian Mountains. Sounds utterly romantic, yes? At the local inn, they find the way to the cemetery. While visiting the family graves, their Jaguar is burgled by three men. Imre is killed and the killers have sex and violence in mind for Justine.