The famous psychoanalyst Gurtuev comes to the famous crime expert Drongo. It turns out that he has developed a unique theory with which you can not only find maniacal killers, but also predict their future crimes. Drongo has a hard time believing this: after all, maniacs, as you know, are the most unpredictable, and therefore elusive, criminals. However, Gurtuev is confident in the power of his invention and predicts: in the very near future a new serial killer will appear in the Urals, capable of eclipsing Chikatilo himself with his deeds. The psychoanalyst's confidence intrigued Drongo. And just in time...