Who can better solve the most complicated crime than the criminal himself? At the initiative of police colonel Stadnik, a department for the investigation of the most complex crimes is formed in the department entrusted to him. The new team includes those who once fell into the millstone of a punitive machine and ended up in jail. The department is headed by Yegor Polyakov, a former special forces soldier who was “written off” for robbing a bank. Investigator Olga Sitnitskaya went to jail for the murder of a sadistic maniac, and Maxim Luzhin, a specialist in external manifestations, turned out to be on the couch by the efforts of an influential corrupt official.