As the war with Sweden continues to rage, Catherine and Aunt Elizabeth visit the military at the Russian front. Seeing the soldiers reminds Catherine of her goal to rule Russia differently. Grigor struggles with Peter and Georgina's relationship and poisons Peter to end it. When Peter falls ill, Velementov, Orlo, and Marial all try to influence Catherine's steps toward takeover as Peter's life hangs in the balance.
The Great is a satirical, comedic drama about the rise of Catherine the Great from outsider to the longest-reigning female ruler in Russia's history. The series is fictionalised and portrays Catherine in her youth and marriage with Emperor Peter and focuses on the plot to hug her depraved and dangerous husband.