During the First World War, a woman doctor falls in love with one of her patients who turns out to be a German spy. She herself ends up working for German intelligence.
| Actor | Role |
|---|---|
 Dita ParloDr. Anne-Marie Lesser | Dr. Anne-Marie Lesser |
 John LoderLt. Peter Carr | Lt. Peter Carr |
 Erich von StroheimCol. W. Mathesius / Simonis | Col. W. Mathesius / Simonis |
 Claire LuceGaby, Rene's Girl | Gaby, Rene's Girl |
 Gyles IshamLt. Hans Hoffman | Lt. Hans Hoffman |
 John AbbottArmand | Armand |
| AAnthony HollesMario | Mario |
| EEdward LexyCarr's Orderly | Carr's Orderly |
 Stewart GrangerBit part (uncredited) | Bit part (uncredited) |
 Clifford EvansRene Condoyan | Rene Condoyan |