A Very dangerous woman

Robert Bruce Lockhart, British diplomat and secret agent, arrived in revolutionary Russia in 1918. His official mission was Britain's envoy to the new Bolshevik government but his real assignment was to create a network of agents and plot the downfall of Lenin. He soon got to know Russian aristocrat Baroness Moura Budberg and they began a passionate affair even though Moura was spying on him for the Bolsheviks. When Lockhart's plot unraveled, she would forsake everything in an attempt to protect him from Lenin's secret police. But he betrayed their love. She fled to a life of exile in England, and later spied for Stalin and for Britain, but Lockhart never returned to her.