Eve's emotions are torn between two European princes, lifelong rivals who happen to be brothers. Eve prefers the nicer of the two princes, but this doesn't stop the other from aggressively stepping up his courtship. When the less agreeable of the two monarches takes control of the throne, he orders Eve to make an immediate choice between himself and his brother.
| Actor | Role |
|---|---|
 Gitta AlpárEva Petri, Sängerin | Eva Petri, Sängerin |
 Max HansenPrinz Michael von Marana | Prinz Michael von Marana |
 Ferdinand von AltenPrinz Wenzel von Marana | Prinz Wenzel von Marana |
 Paul OttoRavel, Bankier | Ravel, Bankier |
| FFritz FischerFlorian, Tenor | Florian, Tenor |
| PPaul HenckelsMontalon, Michaels Adjutant | Montalon, Michaels Adjutant |
 Rudolf PlatteOffizier | Offizier |
| WWolfgang von SchwindtBassist | Bassist |
| EErich FuchsBariton | Bariton |
| LLucy MalataAltistin | Altistin |
| BBarnabas von GéczyNot listed | Not listed |
| CComedian HarmonistsNot listed | Not listed |