It's WWII. A Soviet aircraft crashes on Nazi-occupied territory. Pilot Grivtsov and his radio operator Katya survive, as well as flight navigator Linko, who gets ejected from the plane. Each must find their way, perform haunting military tasks, and simply survive. Complications arise when an act of sabotage committed pre-flight deems Grivtsov a traitor instead of a hero. He now faces execution.