Mary takes extreme measures as she tries to stop Francis from catching Condé; a jealous Catherine wants Narcisse to prove himself; Greer makes a decision that could end her relationship with Leith.
Following a discovery, Bash and Francis formulate a daring plan; Mary has a radical proposal for Claude; Greer realizes she may be more connected to the Protestant movement than she thought.
Mary becomes the temporary leader of France; Catherine asks Narcisse for help beating Mary at her own game; Bash sees a familiar face in the village.
Mary aligns herself with France as the threat of England looms; Condé makes an audacious move; Kenna and Gen. Renaude grow closer.
After an attack on the castle, Francis makes a surprising decision; Mary embarks on a treacherous mission with Lord Condé; Catherine has an erotic encounter in her chambers.