In the days leading up to the Russian Revolution, Stephen Locke, a minor British diplomat in St Petersburg, falls in love with a Russian spy.

Leslie Howardas Stephen 'Steve' Locke
Kay Francisas Elena Moura
William Garganas Bob Medill
Phillip Reedas Gaston LeFarge
Irving Pichelas Sergei Pavlov
Ivan F. Simpsonas 'Poohbah' Evans
Halliwell Hobbesas Sir Walter Carrister
J. Carrol Naishas Commissioner of War Trotsky
Walter Byronas Under Secretary Stanley
Cesar Romeroas Tito Del Val
Ernest Haller