Rebekah arrives in New Orleans at her brother Elijah's insistence, but, concerned that Klaus is up to no good, she seeks help from a reluctant Sophie. Marcel enlists Davina's help.

Elijah is taking control of the quarter and receives a surprising offer, and they know how to throw a party.

After five long years apart, Klaus attempts to reconnect with his daughter, Hope. Even as father and daughter bond, the rest of the family is still in turmoil. Elijah mediates a conflict between Hayley and Freya to determine the best way to protect the family. Meanwhile, in New Orleans, Vincent tells Marcel terrible secrets about his ex -wife, Eva Sinclair, even as they begin their search for a mysterious witch who plans to sacrifice a group of innocent children – including Hope Mikaelson.

When its discovered that The Hollow is using a magical totem to fuel her power, Freya enlists Rebekah and Klaus’ help to locate and destroy it. Elsewhere, an ultimatum by The Hollow puts Kol at odds with his own siblings, while an unexpected run-in forces Marcel and Rebekah to confront the growing tension between them. Finally, The Hollow’s plan for Hayley leaves her in the fight of her life.

Hayley goes missing after someone from her past makes a startling revelation. Klaus has a dangerous encounter with an unexpected visitor. Davina makes a surprising connection. Marcel makes Rebekah an enticing offer that leaves her torn.

Genevieve asks Elijah to allow her coven to publicly celebrate a traditional feast day, where members of the community offer the witches gifts in return for blessings. Meanwhile, Elijah makes plans to restore his home to its former glory; and Klaus sends Cary, a werewolf from his own line, to find a missing piece of family history.

After learning that Cami's life is in danger and Aurora may be to blame, Klaus is forced to engage in another one of her devious games and follows a series of clues she's left behind for him. Meanwhile, Elijah, Freya and Hayley take drastic measures against Tristan when they discover he holds a valuable piece of information they need. Elsewhere, Aya gives Marcel an ultimatum that leaves him with a difficult decision to make, while tensions between Hayley and Jackson cause her to reevaluate her involvement in Mikaelson family matters.

After being marked by The Hollow’s dark magic, both Klaus and Marcel experience the symptoms of a malevolent haunting, forcing the two adversaries on a violent collision course. Meanwhile, Hayley and Elijah head out to speak with Mary after Hayley uncovers a mysterious link between the dark magic and her former wolf pack. Finally, as an exhausted Freya risks her own life to cure Klaus’ infection, a guilt-ridden Keelin must decide whether to honor her hypocratic oath and help Freya – or flee the Mikaelson’s forever.

Klaus returns to the French Quarter of New Orleans, a place where he helped build centuries ago. Now he sees that it has been taken over by his former protege Marcel. Camille, a psychology student, doesn't believe in supernatural beings. However, she finds herself drawn to Klaus. Meanwhile, Hayley and Elijah wait to see what Klaus will do next.

Klaus tries to get adapted to his new duties as he became the king of the city. He offers Marcel a compromise and he fixes his relationship with his siblings. Davina feels betrayed by Marcel. She finally finds an ally, Cami.

In order to uncover what his old acquaintance Tristan is really up to in New Orleans, Elijah considers attending a gala thrown by a mysterious group of ancient vampires known as The Strix, while Hayley invites herself to attend with him. There, Marcel is approached with an enticing offer made by a mysterious woman named Aya, but he quickly realizes that things are not always what they seem. Elsewhere, when a vital component of Lucien's plan goes missing, he and Klaus form a tentative alliance in order to find it.

Going after everything Esther loves. Klaus and Hayley seek an antidote for Elijah in the bayou assisted by Marcel and Josh. Kaleb takes Davina to an old hangout.

With tension running as high as ever, Klaus and Elijah are forced to come together in order to uncover Lucien’s true motives in New Orleans. Cami is caught off guard when she finds herself face to face with Lucien and is surprised when he reveals some unexpected information about his past with Klaus. Elsewhere, a mysterious figure presents an enticing offer to Marcel, while Hayley turns to an unconventional way of coping with her current situation. Finally, an old acquaintance from Elijah’s past arrives in New Orleans and delivers some startling news involving the growing threat to the Mikaelson siblings.

While Klaus finds himself dealing with pressing matters at home, Elijah reluctantly aligns with Aya after learning that she may have knowledge of an elusive weapon that could kill an Original vampire for good. Meanwhile, alone and shunned by her coven of witches, a desperate Davina is left conflicted after she is approached with an enticing offer that could bring her one step closer to reuniting with Kol.

Dangerous foes descend upon New Orleans in an attempt to take down Klaus once and for all when rumors spread about the remaining white oak bullet. As the threats grow, Elijah urges his siblings to lay low at the compound while Marcel, Vincent and Josh chase down a lead involving a mysterious vampire named Sofya. Meanwhile, Kol is forced to face his brother Finn, the person responsible for his death; and Klaus and Hayley seek shelter with her former pack and stumble upon some unsettling news.

On the fifth anniversary of Klaus’ defeat, Marcel is king of the city and welcomes the un-sired vampires to New Orleans, only to find they pose an unexpected threat to his rule, leading him to seek counsel from an unlikely source. Meanwhile, as Hayley closes in on the cure that will allow her to revive Elijah and the slumbering Mikaelsons, she faces a final task that will force her to make a ruthless decision.

When it’s discovered that The Hollow’s latest servant is on the loose, Freya places a protection spell on the compound, forcing Klaus, Hayley and Hope to remain inside. Meanwhile, Elijah takes matters into his own hands when Vincent is reluctant to perform a dangerous ritual needed to strengthen their defense against The Hollow. Finally, while Freya enacts a risky plan that brings her face to face with their latest threat, an unexpected twist leaves her life hanging in the balance.

Betrayal at the masquerade ball? Klaus and Rebekah come together to attempt to unravel Marcel's empire from within, in spite of Elijah's concerns. They enlist help from Sophie.

Determined Rebekah is on a mission to get to the bottom of a recent strange encounter involving Elijah. Davina convinces Marcel to let her attend an annual street music festival.

Locals prepare to celebrate the annual Casket Girls Festival in the French Quarter. Davina tries to free Cami from Klaus's mind compulsion. Hayley is forced to make a difficult decision after she receives an unexpected phone call.

Davina becomes violently ill and the repercussions affect the entire French Quarter. Sophie delivers some startling information about the harvest festival and presents a drastic plan to save Davina. Hayley, racked with guilt, confesses to Elijah about her role in Sophie's plan.

Kieran lashes out unexpectedly after Cami's good intentions don't get her what she expected. Elijah and Klaus can't agree on how to handle the Crescent Wolves. Elijah visits the bayou were he is witness to a explosion that see's hatred between the communities intensify. Hayley learns about her family from Marcel.

As the war among the sire lines continues to grow, Klaus receives an unexpected visit by a figure from his past. When Elijah suspects that Tristan is hiding something, he enlists Marcel's help to find out what he's up to. Elsewhere, Davina struggles with her role as Regent and seeks advice from Hayley. Finally, an ancient secret that is uncovered threatens to tear the Mikaelson brothers apart for good.

Determined to make her ultimate move against the Mikaelson brothers, Aurora uses Freya as bait to lure Klaus and Elijah into a dangerous trap. Meanwhile, after being recruited by The Strix's powerful coven of witches to perform a spell that could save the lives of her closest friends, Davina finds a way to conjure up Kol, the only person who may know the key ingredient to completing the spell. Finally, Hayley is forced to make a heartbreaking sacrifice.

When it's discovered that Freya has been kidnapped and is in the hands of a dangerous new threat, the Mikaelson brothers are forced to put aside their differences in order to save her before it's too late. Following a lead that brings them to Mystic Falls, Elijah and Finn run into deputy Matt Donovan, who does not take well to new vampires in his town. Meanwhile, Klaus and Hayley work together to uncover the motive behind one of Lucien's secret agendas, while a troubling shift in Kol's behavior leaves Davina concerned for their future together.