At the end of the nineteenth century and the beginning of the twentieth, an outstanding sculptor, César Bianki, lived and worked in St. Petersburg. After the October Revolution, having invested all his funds into diamonds and emeralds, he decided to leave Russia, but he caught “Spanish flu” and died. The sculptor’s property was confiscated, but the precious stones could not be found, and Bianki’s trusted servant—like in a delirium—repeated only one thing: the secret is known only by a girl who can read. In our days, a housewife from St. Petersburg, Nadezhda Lebedeva, decided to touch the beauty and went to an exhibition of Bianki’s works—and found herself right in the middle of strange criminal events…