The young detective Oleg Krylov was faced with three curious cases one after another. Each mysterious story is connected with an inheritance, with a treasure, codes and with beautiful love. During the investigations, Oleg will have to delve into the romantic stories of a hundred years ago. He will have to run from killers around Versailles, burden our resident in Paris with business, set a trap in a summer cottage, destroy an old house in Malakhovka and destroy a store on Myasnitskaya. Events are developing rapidly. And not always, and not everything works out the first time. But in such stories, luck must always be fair!