Lev Ganin is a young officer sharing a boarding house in Berlin with a host of Russian émigrés. Alone in his room, he dreams of his first love, Mary. Awash with memories of youth and idyllic scenes of pre-Revolution Russia, Ganin becomes convinced that Mary is in fact the wife of a fellow-boarder, due to arrive at this very house soon. He longs for her arrival, when he can whisk her away and leave everything behind . . .