The sister of a famous, but as yet uncaught, criminal named The Hexer is murdered. Inspector Higgins of Scotland Yard believes that The Hexer will surface to take his revenge on his sister's killers, and plans to set a trap to finally capture him. However, soon bodies start piling up, and it looks as if The Hexer may get away yet again.
Despite their social differences Luise, called Pünktchen, a girl from rich parentage befriends Anton, a boy who has to earn his own money in order to afford life for his sick mother and himself. Together they undergo different adventures, even preventing a theft in Pünktchens home