A number of assassination attempts have been made on the President of Russia over the course of several months. The Presidential Assistant for Security Affairs turns to the country's Deputy Prosecutor General Merkulov for help. Together with the investigator for particularly important cases, Turetsky, they are developing an unusual operation. They manage to prove that a new conspiracy is being formed in the country. The situation becomes especially dangerous when, during the course of the investigation, it turns out that the most trusted people of the head of state are involved in the conspiracy, along with the financial mafia.