Ivan IV
In the Caucasus, Ivan in disguise meets Marie, daughter of Circassian prince Temrouk. Russian soldiers seize her, and her brother Igor is chosen by lot to avenge the family. In Moscow, Ivan chooses Marie as his bride, but she refuses and takes protection from his sister Olga. Igor, Temrouk, and boyar Yorloff conspire against the tsar. Marie falls in love with Ivan but is horrified when Igor comes to kill him. A fire and attack disrupt the palace; Yorloff later claims regency, but Ivan exposes his plot and condemns him, while Marie and Igor are praised.