The events of the film unfold in 1945, after the end of the Second World War. Jake Geismar, an American military journalist arrives in ruined Berlin to write about the post-war city life. There he meets his former sweetheart, German Lina Brandt, with whom he had a relationship before the war. After this meeting, strange events begin to occur around Jake: his driver is found murdered in the Russian zone, unknown persons attack him, and Lina clearly hides something about her past. Jake is going to find out why Lina so desperately wants to flee the country with her husband. After some time, it turns out that Jakes is gradually being drawn into the struggle of Russian and American intelligence services for German rocket scientists.