Conrad Veidt plays a famous musician who is blackmailed for being gay. Eventually he stands trial and is convicted. At the end the film pleads for the abolition of §175 (the law that punishes homosexuality).
| Actor | Role |
|---|---|
 Conrad VeidtPaul Körner | Paul Körner |
 Anita BerberElse Sivers | Else Sivers |
 Magnus HirschfeldDoctor / Sexologist | Doctor / Sexologist |
 Reinhold SchünzelFranz Bollek | Franz Bollek |
 Fritz SchulzKurt Sivers | Kurt Sivers |
| LLeo ConnardPaul's Father | Paul's Father |
| IIlse von Tasso-LindPaul's Mother | Paul's Mother |
 Ernst PittschauPaul's Brother | Paul's Brother |
 Wilhelm DiegelmannKurt's Father | Kurt's Father |
| AAlexandra WielleghPaul's Sister-in-law | Paul's Sister-in-law |
| CClementine PlessnerKurt's Mother | Kurt's Mother |
 Helga MolanderFrau Hellborn | Frau Hellborn |