About the book: 2023 / The duty department of the Ministry of Internal Affairs received a series of strange and seemingly unrelated statements. In one, a witness described how, over the course of several months, the same young man entered the subway in the morning and exited just a few minutes later. In another, the applicant complained that there were too many unfamiliar ladies living in the neighboring apartment: a brunette, a blonde, a redhead. In the third, the deputy’s assistant stated that he had been robbed in a bar for a very large sum... Colonel Gurov undertook to deal with all the episodes, not yet assuming that they were all closely connected with each other and posed a mortal danger to him... Nikolai Leonov, a former investigator of the Moscow Criminal Investigation Department, knew firsthand how the most complicated criminal cases are solved.