"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."
Neil Hamilton
as Lt. Pierre de Montmalion
Brigitte Horney
as Lena Schmidt
Gyles Isham
as Franz Abel
Ivor Barnard
as Baldhead
Charles Carson
as Henri
Raymond Lovell
as German Secret Service Chief
Frederick Lloyd
as French Secret Service Chief
Leslie Perrins
as J 14
Hay Petrie
as Robert Pigeon
Ben Field
as Karl Schmidt
Ralph Truman
as Prison Guard
Arthur Hambling
as Swiss Official (uncredited)
Vi Kaley
as Bakery Customer (uncredited)
Julian Vedey
as Cabaret Proprietor (uncredited)
Margaret Yarde
Basil Mason
Screenplay
Hugh Perceval
Edmond T. Gréville
Jeffrey Dell
Dialogue
Director