Elizabeth pronounces that Catherine's baby will be born in 7 days and the court begins preparations involving rituals for Peter and Catherine. Conflict with the Ottomans heightens, and Catherine tries to run the country while on forced bed rest.

Catherine makes a devastating discovery about Peter before traveling to the war front for a meeting with the Sultan. Peter considers his options now Catherine knows his secret and all parties come together for a final showdown at Marial's wedding.