A German-born woman works as a spy for the French in Switzerland during the First World War, and has to marry an interned French lieutenant in order to be able to stay in the country.
| Actor | Role |
|---|---|
 Neil HamiltonLt. Pierre de Montmalion | Lt. Pierre de Montmalion |
 Brigitte HorneyLena Schmidt | Lena Schmidt |
 Gyles IshamFranz Abel | Franz Abel |
 Ivor BarnardBaldhead | Baldhead |
 Charles CarsonHenri | Henri |
 Raymond LovellGerman Secret Service Chief | German Secret Service Chief |
 Frederick LloydFrench Secret Service Chief | French Secret Service Chief |
 Leslie PerrinsJ 14 | J 14 |
 Hay PetrieRobert Pigeon | Robert Pigeon |
| BBen FieldKarl Schmidt | Karl Schmidt |
 Ralph TrumanPrison Guard | Prison Guard |
 Arthur HamblingSwiss Official (uncredited) | Swiss Official (uncredited) |
 Vi KaleyBakery Customer (uncredited) | Bakery Customer (uncredited) |
| JJulian VedeyCabaret Proprietor (uncredited) | Cabaret Proprietor (uncredited) |
 Margaret YardeBakery Customer (uncredited) | Bakery Customer (uncredited) |