Peter, a young, bankrupt homeowner, wants to sell his house and move in with his aunt Agathe in the countryside. In the meantime, his friend Albert and his niece Inge are supposed to guard the house. When he learns that the three crooks Boxer-Franz, Taschen-August, and Klau-Maxe are already living there, he breaks into his own house, where he encounters the three burglars, who mistake him for a "colleague." The crooks expect him to pretend to be the homeowner and want to keep the proceeds for themselves.

The pretty young seamstress Annie works in the home of the famous Viennese fashion czar Charles Fürst. Hoping to one day win Her Majesty, as Fürst is known, Annie rejects all advances from jazz trumpeter Axel. Her efforts are vindicated when she mistakenly receives an invitation to a royal dinner and is allowed to accompany Charles on a business trip to Paris. But in the city of love, her hopes are abruptly dashed.

With rumbling stomachs and no engagement, musicians Pit, Max, Bill, Gus, Eddi, and Giorgio are on their way to visit their Uncle Hermann, who runs a sports school on Lake Wörthersee. Along the way, they meet the charming teenagers Susi, Evi, Sieglinde, Inez, and Francis, who are on their way to a girls' boarding school. A strict boarding school where male visits are, of course, frowned upon. So the musicians dress up in drag and visit their friends disguised as 'aunts and cousins.' And, as expected, things soon go haywire.