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.
Little Erna is a cheeky Hamburg girl. She gets up to the greatest pranks with her boyfriend. That's why her mother sends her on vacation alone to her aunt. There, too, the little girl gets up to all sorts of mischief...
