Part of the capital of a major Russian businessman Lev Demenshtein, a billionaire who is one of the hundred richest people in the country, someone decided to appropriate for himself. The scam is actually a win-win, because the blackmailers have the most convincing compromising evidence in their hands - a whole pile of documents discrediting the honor and dignity of the oligarch. But Demenstein also has a "trump card up his sleeve" - the famous expert analyst Drongo, whom he invited to figure out the criminals. The suspicions of a specialist fall immediately on four people from the environment of the entrepreneur. It all began sedately and peacefully: polite letters demanding six-figure sums, implicit threats. But as soon as Drongo "stirred a hornet's nest", shots were heard and the first corpses appeared ...