A series of historical novels, jointly created by two famous writers, is addressed to lovers of the adventure genre and connoisseurs of classical Russian prose. In addition to the fascinating plot, these books are especially interesting because many of their heroes are real historical figures, arbiters of the destinies of Russia in the first half of the 19th century. Alexander I, Nicholas I, Benckendorf, Moscow governor Rostopchin - these and other historical characters are reliably and vividly written on the basis of letters and memoirs of contemporaries and are as active participants in the plot as the fictional characters. The action of the third novel takes place in 1830. Viscountess de Grancy, in whom former enemies and lost friends are amazed to recognize Countess Elena Meshcherskaya, who disappeared seventeen years ago, returns to Russia. To take revenge... Find traces of her daughter... And face new challenges that her fate is so generous with.