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 the strong-willed Queen learns of a prophecy that marriage to Mary will cost Francis his life, she is determined to save her son, no matter how many others have to pay with their lives.
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. Meanwhile, when Queen Catherine learns that someone who knows about her plot to destroy Mary is still alive, she stops at nothing to make sure they are silenced for good.
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.
When Olivia, who is an ex-lover of Francis’, arrives at the castle, she brings the dangers of the woods with her. Mary seeks comfort in Bash. Bash is threatened by heretics for interfering with a sacred blood rite. Meanwhile, Aylee is forced to spy on Mary when Queen Catherine blackmails her.
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.
Mary and Francis are forced to rely on one another when the castle is taken hostage, and Catherine shocks everyone when she makes a surprising proposal to try to save their lives. Meanwhile, Bash’s mother Diane tells Bash of her plan to have him legitimized.
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. Clarissa becomes bolder with her endeavors, while Kenna informs Catherine of Diane's plan for Bash, which ends up backfiring.
When Mary and Bash are captured and forced to return to the castle, they discover Catherine waiting and even more determined to keep Mary and Francis apart. Francis learns of the prophecy, but his determination to wed Mary changes everything: in love in politics, tearing the bond of brothers apart, and hardening Catherine's resolve to destroy Mary at any cost.
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.
When King Henry accuses Queen Catherine of treason and adultery, she sets out to save her life by exposing Bash's dark past. Mary and Bash go on a quest to expose an even more deadly secret from Catherine's past. Meanwhile, Nostradamus reveals the truth about the castle ghost, Clarissa, which shocks everyone.
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.
With a forced marriage looming, Mary must consider both her heart and her nation when deciding whom she will wed – Francis or Bash – when Francis returns to court with Lola at his side. Further complicating matters is Mary’s mother, Marie de Guise, who visits the castle with her own agenda for Mary. Marie’s presence worries King Henry and Queen Catherine, who have their own plan for the future of France, regardless of who gets hurt in the process.
Mary returns from her honeymoon and, suspicious of Lola’s strange behavior, uncovers a deception that changes everything. Bash encounters a confused and terrified Olivia, an escaped victim of the terrors of the woods, which causes him to enlist Nostradamus for help. Meanwhile, when King Henry’s odd behavior causes misfortune, he is forced to ask for Queen Catherine’s aid.
The castle is abuzz with First Light, where the women of the castle mingle with potential suitors. Much to Mary’s dismay, Lola is reluctant to participate in the tradition. After another violent incident with the increasingly erratic King Henry, Kenna fears for her safety and confides in Queen Catherine, while Bash experiences the terrors of the woods and vows to uncover the truth behind 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.
When Mary learns of a secret clause in her marriage contract that her mother, Marie de Guise and Queen Catherine orchestrated, Mary and Francis embark on a dangerous plan to turn Scotland against her mother – and Mary gets her first taste of power as the Queen of Scots.
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.
When Mary's uncle, the Duke of Guise, arrives in France with devastating news about her mother, Mary and Francis realize they are torn between putting their own countries first or saving their marriage. With the English throne in jeopardy, King Henry hatches an elaborate plan that will end in disaster. Meanwhile, Bash and Kenna solidify their marriage and begin to trust one another.
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 reveals the truth about his motives, and Lola, blinded by love, finds herself in a dire situation after she attempts to protect him.
When the King's madness and cruelty reaches a fevered pitch, Mary and Francis take action. Their choices could change the course of history, but an unforeseen terror brewing in the woods could cost them, and their friends, everything. Mary makes a drastic decision when she learns Lola is going through a life-threatening labor at a location outside of the castle.
The new King and Queen of France, Francis and Mary are plummeted into chaos after the Black Plague ravages the land and creeps inside the castle, threatening lives and the stability of their new rule. Francis finds himself on the wrong side of the quarantined gates, with Lola, as they try to make their way back to safety. New and murderous foes are introduced as nobles grasp for power, pressuring Mary -- and Catherine -- even as the death count rises. Meanwhile, Kenna and Bash find themselves separated; Kenna's life endangered as she risks all to save their young ward. Greer is forced to watch Leith move on with a new love and is shocked to realize he's involved with her fiancé’s daughter.
A powerful and dominating Lord learns Mary was responsible for his son's death, he demands retribution. Francis and Lola return to the castle with their new son.
Mary searches for a way to feed the people of France; Francis is haunted by suspicions about his dead father's spirit; Catherine plans a lavish coronation ceremony.
Shadowy riders have attacked a shepherd, Lord Conde and Bash investigate. Mary reconsiders her relationship with Lola. Leith returns to court.
Tension rises between the Catholics and the Protestants. Francis receives a gift from his dead father. Kenna is shocked by a discovery.
Upon encountering a mob of angry peasants, Queens Mary and Catherine find themselves concealing their true identities after being forced to abandon their carriage and escape into the woods. Fearful the uprising is a response to his own actions, Francis forms a search party that includes Leith and Conde, only to discover the attack is actually a result of imposters abusing the power of the crown. Meanwhile, Lola sets out to become financially independent but, in the process, finds herself considering a complicated yet intriguing offer from Lord Narcisse.
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, a plot that involves an uncertain Lola. Kenna mistakes Claude for a newfound friend, while Greer returns earlier than expected from her wedding tour.
Tensions escalate between Mary and Francis when Vatican inquisitors perform barbaric acts on anyone suspected of being a Protestant. After a brave proclamation, Lord Condé is abducted, resulting in a precarious situation with a surprising group of assailants. Catherine experiences an annoying setback when she plays matchmaker on behalf of a reluctant Claude, while Narcisse offers a stranded Lola an innocent horse ride back to the castle, where a dark secret involving Francis is revealed.
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 takes action to save Condé when she learns the Vatican is hunting him for bearing the branded mark of the Dark Riders. Francis devises a plan to put an end to the Dark Riders legend, which puts Bash at risk. Meanwhile, Kenna reveals Catherine’s ulterior motives to Claude.
Mary finds out the truth from Greer about rumors going around Court, forcing Mary to do something she never thought possible. Francis finds himself in a growing rivalry with Condé for Mary. Bash’s mother Diane returns, igniting a long overdue confrontation with Catherine, while Claude (Rose Williams) is determined to find out the truth about who really killed the twins.
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, they unearth secrets of the past which force Mary to confront her feelings for Condé as she attempts to move forward. Catherine finds herself in the middle of a romantic triangle when the Duke of Guise returns, which forces Narcisse to commit a hideous act out of desperation. Meanwhile, Greer 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 Condé, 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 Condé’s (Sean Teale) evolving relationship, Francis makes a shocking move. Bash (Torrance Coombs) and Kenna’s marriage is beyond repair after he learns of her scheming, while Leith discovers Greer’s unsavory new career path.
Catherine is suspicious that Mary and Condé are having an affair; Francis becomes ill; Bash's life is in peril; Leith is forced to guard Claude.
Mary finds herself becoming the temporary leader of France. Bash sees a face from the past in the village.
Mary manages to align herself with France as the threat from England looms.
Mary goes to extremes to halt Francis from his quest to catch Condé at any cost. Catherine, jealous of Narcisse’s relationship with Lola, asks him to do something unforgiveable to prove himself, Kenna crosses a line with General Renaude and Greer makes a choice that might end her relationship with Leith.
As troops are about to descend on the castle, Mary (Adelaide Kane) and Francis (Toby Regbo) must put aside their differences to determine the extent of Condé’s (Sean Teale) betrayal. Mary also learns of a bittersweet revelation that tears her apart and makes her question everything. Meanwhile, Catherine (Megan Follows) decides to teach Narcisse (Craig Parker) a lesson to prove he can never cross her again and Bash (Torrance Coombs) decides to bring Delphine (guest star Alexandra Ordolis) 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.
Mary faces struggles in Scotland as Elizabeth and Catherine unite against her. Meanwhile, Elizabeth loses focus because she grows tempted by her first love; and Francis' fate remains uncertain.
Catherine is imprisoned when she returns to France, and Elizabeth faces a political backlash for sheltering her. Meanwhile, the fate of Scotland's future forces Mary to make some tough choices; and Lola feels torn regarding Narcisse.
King Antoine returns unexpectedly, so Mary helps Francis conceal his deteriorating health in order to save his family's future. As time runs out, they're forced to turn to an unlikely ally.
Mary's mother sends her a pressing message to inform her of Scotland's troubles, so Mary seeks help from Francis. Meanwhile, Narcisse becomes an obstacle in Catherine's endeavor to become the regent to Charles; and pressure mounts for Elizabeth to marry.
Grateful for a future with a revived Francis, Mary considers signing away her claim to the English throne, and staying in France forever. Catherine learns that Nostradamus has returned -- with a new vision involving Francis' fate.
Mary realizes she must help Catherine (Megan Follows) in her quest to become regent, even at the risk of hurting the alliance with Scotland. Claude is determined to help Leith marry while Elizabeth struggles with the prospect of losing Dudley.
Mary unearths a dark secret being kept by a Spanish prince, so she seeks Catherine's counsel. Meanwhile, suspicion surrounds a new ambassador from English court; and Bash's quest to find a mysterious murderer takes him to Greer's tavern.
As Mary (Adelaide Kane) and Catherine (Megan Follows) deal with the aftermath of Prince Don Carlos' (guest star Mark Ghanime) accident, Mary realizes that she will have to marry for the good of her country and not follow her heart. When Catherine is accused of poisoning Francis (Toby Regbo), Lola (Anna Popplewell) is shocked when Mary thinks Narcisse (Craig Parker) framed Catherine in order to become Regent of France.
Claude is forced to marry someone selected by Narcisse. Meanwhile, a surprising discovery is made by Elizabeth, and it could alter her reign; and Mary asks Gideon to help her confirm her suspicions about Prince Don Carlos.
Mary's feelings for Gideon are hard to suppress, but she does her best as she seeks political allies. Meanwhile, Elizabeth and Greer face gut-wrenching scenarios; Claude is in danger on her wedding night; and a power struggle over the regency continues.
Charles' coronation nears, forcing Mary to find a suitor who will be her ally. Meanwhile, Lola discovers who's been poisoning Elizabeth; and the castle's serial killer has special plans for Catherine.
Mary must prioritize her life over her cousin's. Meanwhile, Lola and Elizabeth unexpectedly join forces; Catherine can't escape her past; and Mary and Gideon begin to see each other in a new light.
Mary, in order to protect Elizabeth, unknowingly puts Gideon’s life in danger. To save him, Mary turns to another Englishman for help – Robert Dudley. Meanwhile, Bash is determined to track down the men behind the threats to Catherine
Mary realizes her need to return to Scotland is becoming increasingly imminent and that along with the help of Bash, she must raise her own army to save her throne. Elizabeth enlists Lola's help to find out information about her mother, which backfires when Lola gets caught.
Mary learns from Lola that she has a chance to get to Scotland safely, but she must act quietly and quickly. When Catherine is framed for murder, Mary must decide if she should stay to protect her, which would jeopardize her safe passage to Scotland.
When Mary arrives in Scotland, she is stunned by the treacherous world it has become and is forced her to keep her royal identity a secret until she learns who she can trust. When Elizabeth jeopardizes her standing with an unbearable new suitor, Lola steps in to help, which causes the Queen to question Lola’s ulterior motives.
Mary is presumed dead, so Elizabeth seeks her crown with assistance from Lola. Meanwhile, Mary's half brother tries to safeguard her throne from John Knox; and Mary and Bash wind up in the clutches of the intimidating clan leader who killed Francis.
Mary makes a bold move to defend her reign in Scotland, which results in a battle royale with her cousin, Elizabeth. Lola is accused of a heinous crime and suffers the drastic consequences. Meanwhile, back in France, Catherine finds that Charles has returned a changed man after paying a price for his mother's relentless quest for power.
Queen Mary, unsure who to trust, tests her brother James to ensure his loyalty after hearing of his meeting with John Knox. Queen Elizabeth agrees to help Lord Darnley, in an attempt to sabotage the powerful suitor’s relationship with Mary.
Queen Mary discovers there is a leak amongst her advisors and sets out to uncover the traitor. Queen Elizabeth enlists Narcisse to further her quest for supremacy. Meanwhile, Catherine takes desperate measures to regain some of the power she has lost.
Gideon shows Mary what life could be like if she chose love over country. Catherine fights to cover King Charles' increasingly erratic behavior, while Claude finds an enemy in her sister Leeza.
When Lord Darnley surprises Mary with a visit in Scotland, Mary sees a glimmer of a union that could be more than just political. Elizabeth fights to gain allies in her favor and Catherine must work to get Claude back on track by finding her a new husband.
In order to get Mary to agree to a marriage, Lord Darnley must demonstrate his loyalty when she voices her concerns about his true intentions. Catherine and Narcisse work to repair King Charles' reputation after rumors spread about his strange behavior and threaten the throne.
Mary must deal with the political repercussions of a potential marriage to Lord Darnley and King Charles disappears, leaving Catherine to pick up the pieces. Elizabeth comes to Gideon's aid, while Claude receives an interesting proposition.
When Darnley gets a surprise visitor, his marriage to Mary hangs in the balance. Elizabeth learns her attempt to stop Mary backfired. Meanwhile, Catherine and Narcisse find King Charles and must convince him to return to the castle.
As Mary’s upcoming wedding looms, a terrible tragedy pushes Mary and Darnley apart, forcing Mary to enlist in Catherine’s help. Elizabeth encounters a traitor to Spain, who petitions her to support an expedition to the New World.
Mary and Darnley wed in a lavish affair, which proves to be a successful decision in regards to her political standing. James makes an interesting discovery about Greer, while Elizabeth frantically tries to salvage England’s power.
Mary contemplates how to take over the English throne; Elizabeth struggles to find an appropriate suitor to marry; James gets caught up in a scheme orchestrated by John Knox
Mary and Darnley are at odds as their plan to seize England is put into action; Elizabeth is conflicted about her feelings for Gideon; Catherine's son Henri tries to claim the throne from Charles.
After a tragic earthquake hits Scotland, Mary must face John Knox amidst claims that she isn't coming to the aid of her people. Elizabeth takes drastic measures after she is discovered with Gideon, while Charles makes a decision that backfires.
Darnley teams up with John Knox to strip Mary of her throne, which will leave a close friend of Mary's dead. Elizabeth must banish Gideon from court at the request of her future husband, while Charles takes a bold stance against his brother Henri.
Mary pursues justice by launching a counterattack on her conspirators. Meanwhile, Elizabeth suffers a major setback, and it turns her world upside down.
Mary’s life hangs in the balance — Childbirth threatens to take Mary’s life, which leaves her and her unborn child’s safety in jeopardy. Elizabeth discovers that someone in her inner circle was the cause of the death of someone close to her.
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. (Series Finale)
