After death, our contemporary Ivan Gromov comes to his senses in the body of a youth - the eldest son of Grand Duke Ivan III, who received the nickname Grozny during his lifetime. But there will be no second childhood: the mother is poisoned, around treason and intrigue, the brother cuts his brother for the sake of power and friends are no worse than enemies. And the rulers of neighboring countries eagerly look at Moscow Russia, dreaming of tearing off a piece of fat from it... Will Gromov survive in this new world? Will the arrival in Moscow of the new wife of the "father" Sophia Paleolog with a horde of crafty "Danays" prevent? Will it be able to prevent harmful reforms that will set the country back centuries? Will Ivan III the Terrible be able to defeat the Tatars and Litvinas?