Mary, with the threat of England looming, aligns herself with France and thus, the ailing Francis. Condé makes a bold move that would tie him to England. With all of the turmoil, Catherine and Narcisse work to win favor in court. Meanwhile, Kenna gets closer to General Renaude as Bash becomes increasingly distant.

As troops are about to descend on the castle, Mary and Francis must put aside their differences to determine the extent of Condé's betrayal. Mary also learns of a bittersweet revelation that tears her apart and makes her question everything. Meanwhile, Catherine decides to teach Narcisse a lesson to prove he can never cross her again and Bash decides to bring Delphine to the castle.