Marlene Roedern is a student at the Salzburg Mozarteum, as is her boyfriend, Hans Hellmer, a promising conductor. Strothoff, a government cultural representative, engages Hans to conduct at Hamburg. While in Salzburg, Strothoff meets Marlene, who works as a tourist guide in order to pay her tuition fees. He hires her for an all-night tour of the city. She becomes infatuated with him and he with her. Hans is not happy about this.
| Actor | Role |
|---|---|
 Willy BirgelKonsul Strotthoff | Konsul Strotthoff |
 Inge EggerMarlene Roedern | Marlene Roedern |
 Carl WeryProfessor Wegener | Professor Wegener |
 Erik SchumannHans Hellmer | Hans Hellmer |
 Ida KrottendorfHelga | Helga |
 Margarete HaagenMutter Strotthoff | Mutter Strotthoff |
 Charles RegnierConrad Eylers | Conrad Eylers |
| GGerd VespermannNot listed | Not listed |
 Willy MaertensNot listed | Not listed |
 Joseph EggerNot listed | Not listed |
| GGeorg A. ProféMeraner, Pedell | Meraner, Pedell |