In the first months after WWII, Russian and American forces are stationed in a fictional Altenstadt in Germany. In the Soviet part German workers under Soviet guidance reconstruct the industry, in the American part of the city night clubs and casinos flourish, while generals and capitalists are obsessively hunting for the optical patents of a scholar, sympathetic towards the Soviets, who is elected a mayor of the city. When the patents are stolen, the mayor believes that his Soviet friend, the commandant, betrayed him and leaves for the American part of the city. Yet as the misunderstanding becomes obvious, he returns and resumes his duties. A parallel line of the narrative introduces an American female spy, trying to smuggle a Nazi war criminal out to America.