Young professor Anton Kosmich studies the history of Belarus. One day he is mystically transported to the Middle Ages, where he will have to unravel the secrets of the past millennia.
The picture is dedicated to the exploits of the Soviet underground fighters and partisans who heroically fought against the German invaders during the Great Patriotic War. The image of the main character of the railway worker Ales Arlovich is collective, but it is based on the fate of the Soviet underground fighter Fyodor Krylovich, who committed the largest land sabotage of the Second World War at the Osipovichi railway station.