This film's illogical plot is just an excuse to make Heinz Rühmann shine in his typical role as the naive and somewhat gauche man in the street who suddenly finds himself in an adventure, falls in love, and finally gets the girl.
In the first decades of his career, Heinz Rühmann was known (and loved!) only for this kind of harmless fun. At a time when many German actors had to emigrate, Rühmann came to an arrangement with the Nazis: Göbbels personally helped to arrange the safe emigration of Rühmann's first wife, who was Jewish. Rühmann stayed in Germany and continued making light-hearted, unpolitical films that provided ordinary Germans with much-needed escapism. Apparently the Nazis valued this contribution too much to try to pressure Rühmann into producing propaganda films.
In the present film, which appears to be a relatively cheap production, Heinz Rühmann's real co-star is Nils Korff's dachshund. The love story involving Austrian actress Senta Foltin as Dortje (her first cinema role) is cute but very superficial.
Even before and after the performance of a variety show that takes up the core of the film, its strengths lie in the comical scenes held loosely together by an implausible plot. Among other things, we see and hear the Danish flutist playing his instrument in various interesting situations.
Well worth watching for Rühmann fans; others may or may not like it.