The story starts in Crimea. There, in the middle of the Russian Revolution, stays Jeanne, a French woman. Jeanne meets Andreas, a zarist officer that is starting to work for the Bolshevik movement. They both fall in love, but she must go back to France. After a while, Andreas goes to France with the idea of helping the Bolshevik cause there. Andreas is not the only one to arrive in France: a spy called Kalibiev has just arrived.