The protagonist of the series "Karpov" is former police lieutenant Stas Karpov, who is undergoing compulsory treatment in a psychiatric clinic after committing a serious crime while on duty. When he is released, his world is shattered. He is not taken back to his old position in the police, which is now called the police force. As a result, he takes on a part-time job as a warehouse security guard. However, his previous experience starts to manifest itself. When Stas sees a wanted ad for a familiar criminal, he decides to apprehend him himself.