Ekaterina is a historical biographical series which chronicles the rise of the Russian empress Catherine the Great. The first season tells the story of princess Sophie Friederike Auguste, and her rise to power to become Empress of Russia, following a coup d'état and the assassination of her husband, Peter III. The second season portrays the challenges she faces at home and abroad during the early years of her rule, as she tries to revitalise Russia to become one of the great powers of Europe, and becomes titled "the Great".