The Russian lands are subject to the Tatar Khan Berke. Grand Prince Yaroslav (Alexander Ustyugov) rules in Vladimir. He is visited by Khan Mengu-Timur’s nephew, who has come to take no fewer than 40,000 warriors to the Horde. But the envoy is willing to make concessions if he is given Princess Ustinya—the wife of the disgraced Prince Boris, Yaroslav’s brother. In turn, Mengu-Timur leaves the Mongolian beauty and slave Nargiz in Vladimir...