A British spy falls in love with a singer whose husband is working for the enemy.
| Actor | Role |
|---|---|
| DDon AlcaideDuke of Mantua | Duke of Mantua |
 Gitta AlpárMarguerite Salvini | Marguerite Salvini |
| AArty AshInsp. Bartle | Insp. Bartle |
 Nils AstherGalloni | Galloni |
 Coral BrowneCecile | Cecile |
 John LoderRichard Carter | Richard Carter |