The Mysterious Lady
A beautiful Russian spy seduces an Austrian military officer in order to obtain secret plans. When she falls in love with him, both are placed in danger.
Starring Greta Garbo, Conrad Nagel, Gustav von Seyffertitz, Albert Pollet, Edward Connelly, Richard Alexander, Symona Boniface, Geraldine Dvorak, Nicholai Konovaloff, William H. O'Brien
Watch "The Mysterious Lady" on Amazon released in 1928. It's a drama and action & adventure movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.