Based on true events, this story revolves around the activities of police officer Poptsov, who works in the Angarsk Department of Internal Affairs. He believes that society needs to be cleansed of "human garbage." A team of investigators and operatives, led by the experienced and tough Colonel Kovalyov, begins to investigate horrifying murders, initially unaware of who is behind them and what they will encounter in the near future. Despite the challenging situation in the turbulent 90s, they press on with their investigation.