Klim Roshchin is a policeman who started out as an ethologist before the police, studied the life of wolves, and lived in a pack. He uses his animal instinct to catch criminals. A unique policeman who does not use weapons. His arsenal includes deduction, intuition, provocative interrogations and knowledge of the habits of animals. And, of course, an increased sense of justice, because of which he will find all the bad ones, but also all the good ones, his own, will lose.