Catherine takes her first steps toward a coup. Taking advice from Marial, she attempts to seduce and recruit palace intellectual Count Orlo. It’s a disaster. However, after seeing Peter’s brutal treatment of local nobles and unwillingness to listen, he decides to join Catherine’s coup.

Catherine feels optimistic about peaceful coexistence with Peter and their increasing chemistry. When smallpox breaks out in the servant’s quarters, however, Peter reverts to his old ways. Meanwhile, Leo and Catherine’s relationship suffers and Georgina misses Peter.

Catherine’s political abilities are tested when she’s given an opportunity to travel abroad with Peter and Velementov to discuss ending the war with Swedish king. Velementov finally sees the potential of her leadership and decides to support the coup. Back at the palace, Leo wants to leave court. Marial tries to keep him there by telling him about the coup.

Four months after she launched a coup against her husband, a pregnant Catherine is gaining the upper hand in her war against Peter. The fact that he is deeply in love with Catherine and their unborn child does little to dissuade her from taking his throne.

Catherine, Orlo and Velementov begin their rule of Russia and unexpected obstacles appear. Peter is on a journey of self-improvement under house arrest but convinces Catherine to let him attend her coronation and hand over his crown.

Catherine and Peter are co-parenting their newborn son, Paul, with the help of Elizabeth and trying to avoid their feelings for each other. When Paul goes missing, Peter and Catherine are driven together in their quest to find him.