After spending a childhood safely hidden away in a monastery, a teenage Mary Stuart arrives in France where she has been sent to secure Scotland's strategic alliance by formalizing her arranged engagement to the French King's dashing son, Prince Francis. Further complicating things is Bash, Francis' handsome, roguish half-brother and Francis' mother, Queen Catherine.

When Simon, an English envoy, tells Mary that the English are aware of her fragile engagement to Francis, Mary and Francis put on a show to protect their alliance.

When England's armies threaten Scotland's borders, Mary asks King Henry for help, but he refuses. Tomas, the son of the King of Portugal, proposes marriage to Mary, promising her aid against England if she'll abandon Francis and turn to Tomas instead. Francis puts Bash in jeopardy when he lets his feelings for Mary cloud his judgment.

Mary has to decide if she is willing to lie and sentence a man to death in order to have King Henry let her out of her engagement to Prince Francis. Meanwhile, Francis and Bash are suspicious of Tomas' true intentions which will ultimately lead to a confrontation with disastrous results.

An ex-lover of Francis' arrives and brings danger with her, so Bash consoles an uneasy Mary. Meanwhile, Queen Catherine persuades Aylee to snoop on Mary; and Bash lands in hot water with heretics, who accuse him of disrupting a sacred ritual.

An attempt to scare Mary causes Queen Catherine to take drastic measures to make sure the guilty party is caught. Francis, aware of Bash and Mary's growing attraction, turns to Olivia. Bash ventures into the woods to pay his debt - the human sacrifice the pagans demand - and returns with blood on his hands. Meanwhile, Kenna comes clean with the girls about her affair with the King, to a mixed response.

The King goes to war as an unlikely intruder locks down the castle. Mary and Francis realise they must overcome their argument and work together to save everyone at court.

Nostradamus tells Mary of his prophecy that one among them will die soon, which causes Mary to make a decision that will forever change her relationship with Francis.

When Mary and Bash are captured they are forced to return to the castle, tearing the bond of brothers apart and hardening Catherine's resolve to destroy Mary and Francis' love at any cost. Francis learns of the prophecy,

When a plot to kill Bash goes wrong, Queen Catherine is suspected of orchestrating it. Mary offers to help free a wrongly imprisoned pregnant peasant named Isobel who has a mysterious tie to Bash. Meanwhile, Lola blackmails Queen Catherine to keep her from trying to ruin Mary and Bash, whose bond continues to grow.

Henry returns from Rome unsuccessful, and accuses Catherine of adultery with Nostradamus with the goal of executing her. Catherine learns about Isobel's baby but the pagan mark on her foot is gone, making her useless as evidence against Bash. Mary and Bash learn that years ago Catherine had an affair and gave birth to a child before Francis was born. They inform Henry, who realizes that the father is his friend, Richard Delacroix, and has him imprisoned. Henry also rejects Catherine's attempts to out Bash and Diane as pagans, as he already knew about their heritage. Catherine has an encounter with Clarissa and, upon questioning Nostradamus, learns that the girl is a foundling who was disfigured by attempts Nostradamus' father made to remove a birthmark on her face; Clarissa is Catherine's daughter. Catherine attempts a murder-suicide with Mary, but Clarissa saves both of them, and Catherine is taken away to the tower to await her execution.

When Clarissa kidnaps the younger children of King Henry and Queen Catherine, Mary and Bash work with the Queen to find them, with tragic results. Meanwhile, when Lola attempts to help her brother with a debt he owes, Francis rescues her, causing the two of them to grow closer.

It appears to be time for Mary to choose. She has to marry either Francis or Bash taking into account her country's needs as well as her own. This decision gets harder when Francis comes to court with Lola by his side after he saved her in the last episode. It gets even more complicated when Mary's mum comes to France with her own ideas about Mary's future.

Two months after becoming married, Mary and Francis must rejoin court after their idyllic honeymoon. Upon returning, secrets they hoped to bury start coming out. Meanwhile, King Henry and Queen Catherine bond over spilled blood.

As women in the castle mingle with possible suitors, Lola is reluctant to participate. Kenna fears for her safety after another violent incident with King Henry. Bash determines to uncover the truth about the darkness.

When Francis reluctantly agrees to help Bash uncover the threat in the woods, he ends in grave danger, with only Bash to save him. Meanwhile, the King's madness causes chaos when a servant wins "Queen for the Day," and the King becomes obsessed with her. The King also forces a surprising, and unbreakable, union with a new couple at Court. Meanwhile, Greer gets caught kissing kitchen servant Leith, which threatens to ruin her.

Mary uncovers her marriage contract's secret clause.

When Mary's brother James arrives in France and convinces Mary to return to Scotland, Francis is suspicious and uncovers a plot that would destroy Mary, which causes a rift between them. King Henry's downward spiral continues, leaving Penelope in charge, causing Catherine and Kenna to take drastic measures. Meanwhile, Lola becomes wary of Lord Julien's motives behind his marriage proposal.

Mary and Francis are forced to make difficult choices between Scotland, France, or their marriage; Mary's uncle brings bad news regarding Marie de Guise; Henry makes some bad choices for France; Bash and Kenna continue to work on their marriage.

Mary enlists a mercenary to help her, which forces her to realize there are sacrifices and lives she is willing to risk to save her country. Francis embraces his role as Dauphin to lead France in a brutal battle against England, and finds a new ally in Leith. Meanwhile, as Lola grows closer to Lord Julien, she gets increasingly suspicious that he is going to betray her.

Mary and Catherine form an unlikely alliance when deciding how to deal with the increasingly manic King Henry, which puts Francis in jeopardy. Bash finds a boy who lived to tell about his encounter with the Darkness, which makes Bash determined to end it for good at any cost. Lord Julien (guest star Giacomo Gianniotti) reveals the truth about his motives, and Lola, blinded by love, finds herself in a dire situation after she attempts to protect him.

Henry plots to kill Francis, and begins his efforts to woo and marry Mary. Leith returns to win Greer back. Lola goes into labour. Francis, Catherine and Mary plan a coup. The Darkness returns for Pascal.

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.

In England, Elizabeth is now being counseled by Catherine de Medici, together they seek Mary's downfall. In France, Francis must deal with his declining health.

As Francis' condition worsens he has plans for Mary's future and the next King of France.

When King Antoine makes an unexpected return. Mary and Francis turn to an unlikely ally to help hide Francis' condition and secure his family's future.

After Mary receives an urgent message from her ailing mother about the dire situation in Scotland, she finds herself looking to Francis for aid. Catherine finds herself up against Narcisse as she fights to become the regent to Charles. Meanwhile, Elizabeth faces continued pressure to wed.

As the king Francis returns to life, Nostradamus is back with a new prophecy about his death. Meanwhile the English ambassador is offering Mary a chance at peace by signing away her claim to the English throne.

Lola tells Mary she may have a chance to get to Scotland. A murder takes place and Catherine is framed for it. Mary must decide if she should help Catherine or leave for Scotland. If Mary helps Catherine it could eliminate the possibility of safe passage to Scotland.

Mary makes a decision that will change the course of history, forever shaping the fate of her nation, her crown, and her newborn son. Mary's perilous move for her survival causes the stunning realization that perhaps she is not the only one who may not survive. Meanwhile, Elizabeth steadies herself for war and will become the instigator in Mary's demise while later realizing she and Mary might be more similar than either thought.

As the king Francis returns to life, Nostradamus is back with a new prophecy about his death. Meanwhile the English ambassador is offering Mary a chance at peace by signing away her claim to the English throne.

When King Antoine makes an unexpected return. Mary and Francis turn to an unlikely ally to help hide Francis' condition and secure his family's future.

After Mary receives an urgent message from her ailing mother about the dire situation in Scotland, she finds herself looking to Francis for aid. Catherine finds herself up against Narcisse as she fights to become the regent to Charles. Meanwhile, Elizabeth faces continued pressure to wed.

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.

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?

Mary has to decide if she is willing to lie and sentence a man to death in order to have King Henry let her out of her engagement to Prince Francis. Meanwhile, Francis and Bash are suspicious of Tomas' true intentions which will ultimately lead to a confrontation with disastrous results.

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.

When England's armies threaten Scotland's borders, Mary asks King Henry for help, but he refuses. Tomas, the son of the King of Portugal, proposes marriage to Mary, promising her aid against England if she'll abandon Francis and turn to Tomas instead. Francis puts Bash in jeopardy when he lets his feelings for Mary cloud his judgment.

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.

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.