It is 1917 and the Russian Revolution is sweeping the country. Elena has dedicated her life to the Cause as personified by Lenin. But during a street riot her life is saved by Stephen Locke, an unofficial diplomatic agent. The two, although dedicated to opposing causes, fall for each other. But Elena learns that Locke is wanted by the secret police and she is ordered to obtain evidence of Locke's scheming. She does so--although she knows this will condemn him to death.