Businessman Sergei Monakhov is very dissatisfied with the way the investigation into the murder of his younger brother Alexei is going. The case was returned, and the new investigator turned out to be a bore and a cowardly overcautious man. Sergei is absolutely sure that his brother, a Russian patriot, was killed by a “foreigner” from among the guards of the holiday village where Alexei lived. Not trusting the official investigation, Monakhov Sr. turns to the famous crime expert Drongo for help. The private investigator begins a parallel investigation, not expecting that the final point in this complicated case will be put... by a gynecologist.