Andrii Petrovych Lvov, a veteran of the Great Patriotic War, lived an honest and just life. He also raised his daughter, granddaughter, and then his great-grandson, Andriyusha. So much so that when the boy went to serve in the army, he could not put up with the arbitrariness of the evil and complex Captain Yefremov. In a state of alcoholic insanity, the captain shot and killed the boy - the official version was that he had been careless with his weapon. The old man found out the truth only six months later from his great-grandson's demobilised colleague. And this truth intersected with his own secret... Nevertheless, the old man took his award-winning pistol and went to the garrison town to restore justice...