Olga, who was taken to the West by Hitler's invaders, works as a switchman at a railway station. Echelons with prisoners of war - convicts - pass by her every day. Olga gets acquainted with the machinist Fyodor and with his help organizes the escape of her camp mates. But the plan fails, and the escapees are shot. Fyodor, who miraculously survived, gets to the homeland. And after the war, chance again brings him together with Olga, when the hero with severe burns after an accident falls into the hospital...