Kathrin, Sylvio, and Pierre are music students in Paris. Due to their financial difficulties, the bailiff Fogar is even forced to seize their musical instruments. However, he allows them to continue practicing with them in his warehouse. There, the trio meets the composer Duval, who is also struggling financially.
| Actor | Role |
|---|---|
| CCaterina ValenteKathrin | Kathrin |
 Peter AlexanderPierre | Pierre |
| SSilvio FrancescoSilvio | Silvio |
 Dietmar SchönherrDuval | Duval |
 Rudolf VogelAristide Fogar | Aristide Fogar |
 Helen VitaDenise | Denise |
 Hans-Joachim KulenkampffColumbus | Columbus |
 Rolf OlsenLebaudi | Lebaudi |
 Sabine HahnTherese | Therese |
 Fayard NicholasNot listed | Not listed |
 Harold NicholasNot listed | Not listed |
| KKurt EdelhagenNot listed | Not listed |
 Klaus SchwarzkopfNot listed | Not listed |