During the Russian Civil War, a soldier of the Red Army succeeds in taking a White Guard officer as prisoner. A bloody battle rages all around them. The two soldiers finally remain alone. It is soon discovered that the Red Army soldier is a young woman. In the dusk she sings the feverish enemy to sleep and the mountains join her in her singing. In their loneliness, the enemies do not speak to each other. Little by little, however, feelings of love burgeon in the young woman — she dreams of being a beloved wife. The White Guard soldier, too, does not have the heart to kill his enemy. Their tender act of drawing closer together is interrupted when soldiers of both sides approach again — the world again disintegrates into friends and foes. The Red Army soldier finally shoots the White Guard officer dead.