When war is declared in 1914, glamorous Russian Carla Vanirska manages to get to Vienna from Luxembourg, with the help of Captain Rudolph Ritter of the Austrian army. Meanwhile, Ritter is assigned to detect the identity of a spy.

• RKO Radio Pictures
• Constance Bennett
• Gilbert Roland
• Edward Ellis
• Lucien Prival
• Ben Hendricks Jr.
• Leonid Snegoff
• John Wray
• Mischa Auer