It is sometimes very dangerous to rush to the premiere at the Mariinsky Theater, especially if the incomparable Anna Netrebko is preparing to appear on stage. Among music lovers there are people who are ready to listen to Mozart himself with half an ear - they are more interested in other people's wives in neighboring boxes and diamond jewelry on ladies from high society. Lenya Marquis, known among swindlers no less than Netrebko among opera lovers, will get involved in another scam with diamonds in the theater. He has only four days to replace the fake necklace with a real one, otherwise the next “Marriage of Figaro” at the Mariinsky Theater will definitely be staged without it...