Weltbrand (1920)

At the salon of his lover, Paris dancer Eva Sorel, Christian Wahnschaffe, the spoiled son of an industrialist, meets Iwan Becker, a leader in the Russian Nihilist movement. Impressed by Becker's concern for society's weak and poor, Christian develops sympathies for the movement's ideals. When Eva begins a relationship with a powerful Russian prince, she poses a danger to Becker, who has entrusted her with his secret plans for a revolution for safekeeping.