Late 1940s. Mikhail Krasnitsky leads a quiet life near Rostov with his beloved wife Riva. When the firstborn of Michael and Riva dies, the hero takes it as a sign from above. Under the pretext of business trips, the hero begins to travel around the cities of the USSR, where, in cold blood, for an unclear reason, he commits murders. Investigator UGRO captain Smolov manages to connect cases of murders that occurred in different parts of the country.