Conni goes on a big trip without her family for the first time! Of course her best friends Anna and Simon are with her, only her cat Mau is not allowed to come along. As soon as they arrive at the hotel at the old castle mill, Conni discovers that Mau has found a way to smuggle himself in as a stowaway. But pets are not allowed in the accommodation and to make matters worse, the hotel owner Mrs. Weingärtner is allergic to cat hair. Conni tries to hide Mau but the cheeky tomcat doesn’t care. He curiously explores the surroundings and causes a lot of nonsense, for which Mrs. Weingärtner identifies Oskar the raccoon as the culprit and then wants to give him to the zoo. And then things start disappearing from the hotel in strange ways. Conni and her friends have to act quickly: Will the children succeed in rescuing Oskar the raccoon, taming Mau and even catching a real thief?
Emma Breitschaft, Valentin Schiweck, Juno Wellershoff