As Francis leaves Court to find Lola and his child, he must try and avoid the plague, back at Court Mary and Catherine must keep safe from the plague while the nobles and servants are getting sicker and sicker.

In the aftermath of the plague, a powerful lord (Craig Parker) discovers that Mary was responsible for the death of his son and demands vengeance, testing the loyalties of Mary, Francis and Catherine. Francis returns to the castle with Lola and their newborn son, creating tension with Mary. Greer is torn by her loyalty to her fiancé, Lord Castleroy, who blames Leith for his daughter's demise. Meanwhile, Kenna urges Bash to be formally recognized in his new role.

With France in a state of famine, as well as religious and political unrest, Mary looks for a way to feed the people, risking the wrath of a vengeful Lord Narcisse (Craig Parker). Francis is preoccupied by the harrowing suspicion that his dead father's spirit can possess the living and is haunting Francis as revenge for his murder. As Catherine makes excessive and lavish preparations for a coronation ceremony to give the impression of stability to the realm, Bash confronts the reality of a country plagued by fear, bankruptcy, and murder.

As Francis and Lola start the preparations for their son's christening, Mary and Lola make a scheme to help Estelle from Lord Narcisse. Mary gets shocking news that will change her life and Greer tries to tell Castleroy how she feels.

Tensions between Protestants and Catholics escalate when bloodshed at a Protestant service causes an already concerned Mary and Francis to intervene on the eve of Greer's wedding. Bash and Leith lead a search for the guilty that reveals a surprising secret about Castleroy that could destroy his union with Greer. Meanwhile, Francis receives an unwelcome gift from his dead father. Kenna discovers a sex journal, with clues leading to the best lover at court, who just might be a match for Lola.

Mary and Catherine leave for a town when their carriage is overrun and they leave for safety, but they are far from that. Lola and Narcisse become closer and Mary and Francis are still having some problems.

Young, reckless and provocative Princess Claude makes a surprise visit home, torturing her already haunted mother, Catherine. Francis is pressured by Narcisse to act against his conscience or risk his throne and his wife. Mary finds a new ally in Condé. Francis confides in Bash and hatches a plot that involves an uncertain Lola. Kenna mistakes Claude for a newfound friend, while Greer returns earlier than expected from her wedding tour.

The tensions between the Protestants and Catholics increases because of the edict Lord Narcisse blackmailed Francis into signing. Mary and Francis' relationship hits a wall due to the secrets he is keeping. Queen Catherine is still dealing with ghosts from her past while trying to deal with her daughter, Princess Claude.

While Francis and Bash are out trying to find Montgomery the Protestants are becoming more and more restless. Mary is alone at the castle and Protestant men storm it, leaving Mary in distress. Castleroy doesn't realise what he has been funding while he thought it was schools.

Mary and Conde set off to find who attacked Mary. Narcisse becomes Francis' puppet. Someone poisons Claude, and has Catherine gone mad? Could Mary and Francis return to normal after what happened? Mary finds Conde's letter, and is surprised by what she reads. Conde's brother pays him a visit.

Bash and Francis figure out who is really behind the branding, and plot to stop the bloodshed. Mary and Greer help Prince Conde escape questions from the cardinal and end up at Conde's brothers palace, during a scandalous party. Kenna tries to help the princess Claude from Katherine, who is mad and hallucinating that she must avenge her long dead twin daughters.

Bash uncovers the truth about the death of the twins - vengeance and justice consume Catherine's haunted past. The hunt to uncover the Protestant radicals reveals ties far too close to court. Desisions to protect the crown - changes the lives of the Queens' Ladies.

As the castle prepares for the Winter's Ease Feast, King Antoine of Navarre reveals to Francis and Mary England's plan for revenge against France. Bash learns that an "undead" man has been seen in the village and his efforts to track the man down lead him to a mysterious woman in white. Meanwhile, Catherine finds out the cause of her hallucinations.

As Mary and Francis investigate who was behind the poisoning of King Henry (Alan Van Sprang), they unearth secrets of the past which force Mary to confront her feelings for Conde as she attempts to move forward. Catherine finds herself in the middle of a romantic triangle when the Duke of Guise (guest star Gil Darnell) returns, which forces Narcisse (Craig Parker) to commit a hideous act out of desperation. Meanwhile, Greer (Celina Sinden) finds herself in a situation she never fathomed in order to survive.

Mary's mother returns to advise Mary that her throne is in jeopardy. Mary makes a shocking proposition to Conde, along with a bold move to reclaim her throne. Francis moves closer to Lola after a setback with Mary, while King Antoine makes Kenna an interesting offer.

When King Antoine threatens to tell Francis of Mary and Conde's evolving relationship, Francis makes a shocking move. Bash and Kenna's marriage is beyond repair after he learns of her scheming, while Leith discovers Greer's unsavory new career path.

Mary and Condé continue to make arrangements to go to Scotland, while Condé continues to meet with Elizabeth's envoy. Catherine becomes suspicious of the relationship between Mary and Condé. Leith offers to try and help Greer.

As Bash is being healed by the white witch, an old enemy shows up. Francis is on the edge of death and Mary must help Scotland from being under attack. Mary must make a decision to stay with Francis or go to Scotland with Conde.

Mary, with the threat of England looming, aligns herself with France and thus, the ailing Francis. Conde 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.

Mary goes to extremes to halt Francis from his quest to catch Conde at any cost. Catherine, jealous of Narcisse's relationship with Lola, asks him to do something unforgivable to prove himself, Kenna crosses a line with General Renaude and Greer makes a choice that might end her relationship with Leith.

After an attack on the castle everybody is very scared; Conde finds news out about Mary; Catherine is determined to hurt Narcisse; Bash brings Delphine to the castle but what does she have up her sleeve?

As Francis thinks Mary is turning against France, she risks everything in order to take Conde down; Catherine meets with Queen Elizabeth and has a proposition for her; Kenna's secret will seal the fate of her relationship with Bash.