Minna lives with strict German-born parents who privately hope their young daughter's friendship with the well-to-do Owen children - Toby, Harold and Adelaide - will do her some good. But Minna's parents have no clue what these kids get up to when they're on their own. Their favourite game is seeing who can scare the others the most. But when the Owens blame Minna for a disaster caused by their own children, she decides to give them the fright of their life. Unwisely, Minna helps herself to her friend Leck's beloved magic lantern to carry out her revenge and soon she is in more trouble than ever.