In the second-season opener, a plague sweeps across the land and threatens the stability of the kingdom. Meanwhile, Francis and Lola aren't allowed back home because of the quarantine; Kenna's life is jeopardized; and Leith finds a new romantic interest.
A vengeful lord blames Mary for the death of his son. Meanwhile, Francis, Lola and their newborn return home; Lord Castleroy's anger toward Leith puts Greer in an awkward position; and Kenna pressures Bash to have his new role formally recognized.
Mary wants to feed the people affected by famine, but her actions could displease Lord Narcisse. Meanwhile, Francis fears his father's spirit is haunting him; Catherine plans an opulent coronation ceremony; and Bash confronts France's harsh realities.
A shepherd's attack is investigated by Bash and Condé. Meanwhile, Mary reexamines her complex bond with Lola; Greer focuses on her future; and Lola's suspicions are aroused when Lord Narcisse presents his new bride.
Greer's wedding nears as fighting intensifies between the Catholics and Protestants. Meanwhile, Bash and Leith uncover a secret about Castleroy; Francis gets an unwanted gift from Henry; and Kenna finds a journal describing the best lover at court.
Mary and Catherine hide in the woods, masking their identities in the midst of a peasant uprising, and a concerned Francis forms a search party for them. Elsewhere, Lola seeks financial independence, but then she ponders Lord Narcisse's tempting offer.
Princess Claude makes an unexpected visit home and exasperates her mother. Meanwhile, Narcisse uses threats to try to get Francis to betray his ethics; Mary and Condé become allies; Greer returns from her wedding tour early; and Kenna befriends the wrong person.
Protestants are harmed by Vatican inquisitors, and this creates discord between Mary and Francis. Meanwhile, Condé gets captured after he makes a bold declaration; Catherine fails at finding a suitor for Claude; and Narcisse gives Lola a ride home.
Mary proposes a marriage idea for Claude, but Claude has plans of her own. Meanwhile, Bash and Francis concoct a scheme to free Francis from following Narcisse's demands; and Greer discovers she may be deeper in the Protestant movement than she realized.
Francis tracks Narcisse with a passion for revenge. Meanwhile, Mary discovers Francis was being blackmailed, leading her and Condé to tackle a dangerous mission; Leith begs Greer to flee for her own safety; and Catherine receives a surprisingly erotic visit in her chambers.
Mary tries to save Condé, who's targeted by the Vatican because of his Dark Riders branding. Meanwhile, Francis endangers Bash with his plot to dissolve the Dark Riders legend; and Kenna exposes Catherine's true objective to Claude.
Greer tells Mary the truth about some rumors, leading Mary to take surprising action. Meanwhile, the rivalry between Francis and Condé intensifies; Diane has a showdown with Catherine; and Claude tries to uncover who's responsible for the twins' deaths.
England's revenge plans against France are disclosed to Francis and Mary. Meanwhile, Bash searches for an "undead" man observed in the village and finds a mysterious woman in white along the way; and Catherine uncovers the reason for her hallucinations.
King Henry's poisoning is investigated by Francis and Mary. Meanwhile, the Duke of Guise's return puts Catherine in the midst of a romantic triangle; Mary confronts her feelings for Condé; and Greer finds herself in an unexpected situation.
Mary's mother returns to warn her about threats to her throne, so Mary makes a daring move. Meanwhile, a stumbling block with Mary pushes Francis closer to Lola; and Kenna receives an intriguing offer from Antoine.
Bash's marriage deteriorates further after he uncovers Kenna's conniving actions. Meanwhile, Leith finds out about Greer's shady new career; and Antoine threatens to tell Francis about Mary and Condé's deepening bond.
Francis becomes seriously ill after he collapses. Meanwhile, Bash's life is in danger; Catherine suspects that Mary is being unfaithful to Francis; and Leith is tasked with being Claude's personal guard.
Mary rises to power as Francis remains gravely ill, and Mary realizes she can save her homeland. Meanwhile, Catherine seeks help from Narcisse in her plot to expose Mary's infidelity; and a vengeful Bash sees a face he recognizes in the village.
England's threats mount, so Condé aligns with the British while Mary restores her bond with France. Meanwhile, Catherine and Narcisse work their charms with those in court; and Kenna forms a connection with Gen. Renaude as Bash grows more aloof.
Catherine grows jealous of Narcisse's bond with Lola, so she requests a demonstration of his loyalty. Meanwhile, Mary takes drastic measures to stop Francis from capturing Condé; and Greer makes a decision that jeopardizes her relationship with Leith.
Troops reach the castle in the wake of Conde's betrayal, leading Mary and Francis to unite and look past their differences. Meanwhile, Catherine teaches Narcisse not to be disloyal again; and Bash invites Delphine to the castle.
In the second-season finale, Mary stops at nothing to ruin Condé. Meanwhile, Catherine meets with Elizabeth as a part a vengeful plot against Mary; Francis doubts Mary's loyalty to France; and Kenna holds a secret that affects her relationship with Bash.