The year is 1984. The Byelorussian SSR. Leonid Ipatiev, senior investigator of the Minsk Prosecutor's Office, arrives in Vitebsk to investigate the case of the missing traffic police inspector. The inspector's body was not found, but the corpse of a young girl with signs of sexual assault and strangulation was found. Ipatiev finds out that 36 women have been strangled and raped in the Vitebsk region over the past 14 years, and all these cases were closed by Vitebsk investigator Mikhail Shakhnovich. Unprecedented statistics! Ipatiev suggests that a maniac is operating in the region. With the help of a young operative, Yura Mandrik, and a criminologist, Asi Krugovoy, Ipatiev initiates the resumption of the investigation, which causes a fierce confrontation between Shakhnovich: there is no sex in the USSR, and even more so sexual maniacs.