Peter has a new lease on life after his near-death experience. He is open to Catherine’s progressive ideas of introducing art and science to court and wants to focus on an heir. Orlo tries to figure out who poisoned Peter and faces demons of his own.

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.

Tensions mount as Catherine, Orlo, Velementov, Leo, and Marial try to get regional counts on board with the coup. A few of the men end up killed. When a body is discovered later, Peter decides to torture everyone at the palace to find the murderous traitors. Marial buckles under the pressure and confides in Archie about Catherine’s plans. Catherine realizes she is pregnant.