Everything goes wrong for Mildred again. And this time it's not really her fault, because she has to watch out for the new girl, Edith Nachtschatten. And Edith keeps putting her in difficult situations: whether it's music lessons, the theater troupe or detention. The expulsion from school hovers over Mildred's head and gets closer and closer. The situation escalates dramatically when a monkey escapes from Edith's room and Mildred tries to catch him again. ...with a dangerous broom-flying operation.