An engineer, a musician, and a salesman are heading off on summer vacation in an old VW and a rented caravan. The confirmed bachelors want to enjoy their freedom. But the musician falls in love with a hotel telephone operator, and the engineer with a merchant's daughter. This leads to turmoil, with lots of fun and music!

Oberst Alfred Redl heads the military intelligence department of the Austro-Hungarian monarchy. Frequent letters from the Russian Empire, however, make him suspect of sharing his knowledge with unauthorized authorities.

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 th...