Peter Franke owns Supraphon record company, which has one main competitor in Lyraphon. As a commercial strategy Peter gets engaged to her counter partner Asta, to his assistant Münzer's approval. Then he meets Wally Sommer, singing saleswoman at one of his shops, and all his plans are turned upside down while they both fall in love in this light musical comedy filled with Robert Stolz music.

Nicky and Vicky, two librettists who also happen to be brothers, are presently in collaboration with composer Toni. All too aware of Toni's amorous escapades, Nicky and Vicky try to keep the existence of their pretty sister Hedi a secret. Suffering from an acute case of writers' block (he has yet to find an inspiration for his next production), Toni throws a huge party, which is boycotted by his friends and associates so that he'll keep his mind on his work.

When their relatives from the countryside miss the train to their wedding anniversary, Lawyer Dr. Helwing and his wife Dolly decide to go out together. Meanwhile, infamous burglar "Monokel-Fredy" enters the Helwing villa with some of his cronies, only to find out that the relatives have arrived after all.