Hans von Arnam travels to a Flemish village to study a strange carousel located in an old windmill that displays famous murderesses and other notorious women from history. Professor Gregorius Wahl, owner of the windmill, warns Hans to stay away from his mysterious daughter Elfi, in order to keep Hans from discovering the horrible secret shared by the Professor and Elfi's Doctor.
Rival gangsters from Chicago move to London and attempt to extort money from rich Britons.
