Summer 1945, a small mining town in Silesia. A new life is being established, but the secret forces of the Werewolf interfere. In this difficult situation, Major Jan Reiner of the Polish Army is given the task of restoring the mine. Lieutenant Valchuk, who suspects a fascist in every local resident, believes that Jan is in collusion with the "werewolves". And then Yang decides to take a dangerous step: by infiltrating the enemy squad, risking his life, he plans to prevent an explosion that is being prepared at the mine.
