Lyubov Yarovaya (1970)

This film is set in the time of the Russian Civil War, after the October revolution of 1917. The communist forces are losing a battle over town. They must blow up the strategic bridge, but the explosion is prevented by one anticommunist man, who is posing as a communist commissar. His wife, Lyubov Yarovaya, discovers him. He is asking for her forgiveness, but she is uncompromising and ruthless.