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 wants Hayley to re-establish herself in her pack. Mikael is impatient under Davina. Cassie arouses suspicions.

Rebekah persuades Klaus and Elijah to take part in a family tradition from their childhood.

Months following their violent and deadly showdown with the powerful witch Dahlia, a rift continues to divide brothers Klaus and Elijah, while Freya searches for a way to heal their fractured bond and return their family to the way they once were. Meanwhile, Klaus' suspicion piques when he learns that an old vampire friend named Lucien has arrived to New Orleans with a mysterious agenda involving the Mikaelson's remaining sire lines. Elsewhere, Elijah questions whether he can truly forgive his brother for his mounting offenses, while Hayley struggles with being cursed to her wolf form in the bayou. In the French Quarter, Vincent and Cami assist Detective Kinney after a series of gruesome discoveries are made, leading them to believe they may have a serial killer on the loose. Finally, Marcel, who has regained control of the French Quarter once again, tries a new strategy to recruit vampires, while Davina, who is now Regent to the New Orleans witches, makes a decision that will find her and Marcel on opposite sides of an escalating conflict.

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.

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.

With the threat of the prophecy looming over their heads, Klaus and Elijah find themselves rendered useless inside a magical trap, while Aya and The Strix's coven of witches move forward with a risky spell that could take one of them down for good. Elsewhere, Freya leads the charge to get her brothers back and enlists the help of Marcel, Hayley and Stefan Salvatore, an old friend of Klaus', whose unexpected arrival may be the key to their survival. Finally, Davina moves forward with a dangerous plan that brings her one step closer to reuniting with Kol.

The crossover starts on The Vampire Diaries S7E14 Moonlight on the Bayou (I).

When Klaus learns that Cortez, an old vampire with a vendetta against him, has arrived in New Orleans, he finds himself forced to deal with this new threat. Meanwhile, when Cortez begins threatening the lives of innocent residents, Vincent has no choice but to help the vengeful vampire in his plan to take down Klaus. Elsewhere, Marcel turns to Davina for her help after several Strix members turn up missing, and Elijah confronts Hayley after learning that she’s been dealing with Jackson’s death in a destructive way.

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.

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.

As the city celebrates its annual Jazz Fest, an unlikely team of Mikaelson foes joins forces to take Klaus hostage. Leading the charge to get their brother back, Elijah and Freya face off against a powerful force like none they’ve ever seen before, while Hayley and Cami set their own risky plan in motion to rescue Klaus. Meanwhile, when Kol’s erratic behavior worsens, Davina has no choice but to turn to Marcel and Vincent for help.

Following a violent encounter that has left Cami’s life hanging in the balance, Klaus is forced to rely on his family and allies to find a cure as he keeps a watchful eye over Cami at the compound. With time running out, Freya turns to her arsenal of spells, while Vincent and Marcel head to Cami’s apartment to gather a crucial ingredient. Elsewhere, Hayley and Elijah travel to the bayou in hopes of bringing back a potential antidote that could save Cami’s life. Finally, Davina confronts Lucien and learns some heartbreaking information that will change her future with Kol forever.

In the wake of a ruthless plan that has left their family shattered, Klaus, Elijah and Freya desperately search for a way to take down Lucien once and for all. However, their efforts are put on hold following an urgent plea for help from Kol and Marcel. At Klaus’ insistence, Freya and Elijah reluctantly stay behind to offer their help, while Klaus and Hayley head to the bayou after uncovering Lucien’s latest plan. Once there, an unexpected showdown between Klaus and Lucien forces Freya to take matters into her own hands, setting off a chain of events that will change all of their lives forever.

After receiving new visions of the looming prophecy, Freya uncovers that her family is on a collision course with a dangerous new enemy. Meanwhile, with the help of Detective Kinney, Vincent and Kol travel to the ancestral world to put a stop to the witches and take back their city once and for all. Elsewhere, Klaus and Elijah confront Marcel after a heartbreaking plan gone wrong has sent him spiraling.

After months of thwarting off dangerous threats and deadly attacks, the Mikaelson siblings finally come face to face with the one person that could lead to their ultimate demise. With the stakes higher than ever and the compound overrun by an army of his oldest sworn enemies, Klaus is put on trial for centuries of atrocities he’s committed. Meanwhile, Marcel, who has been spiraling out of control following an act of betrayal by those closest to him, is stunned by the unexpected arrival of someone from his past. Finally, Elijah, Freya and Kol frantically search for a way to save their family before it’s too late.

After being cured and woken, the Mikaelson siblings join Hayley in an effort to rescue Klaus from captivity – even if they must face Marcel in the process. Meanwhile, Klaus’ demons materialize in unexpected ways as he suffers from the effects of the Tunde Blade, and Vincent investigates a haunting that will prove to be much more sinister than he could have imagined.

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.

Klaus requests that his estranged siblings Rebekah and Kol return home to stand by their family against The Hollow. Meanwhile, Freya recruits Hayley for a dangerous journey that will put both their lives at risk — but may be the sole means of saving someone they love. Elsewhere, tensions rise when Marcel leads a hunt for The Hollow — putting him on a collision course with the person he was least prepared to face. Finally, as Kol continues to mourn the loss of Davina, he is forced to consider the lengths he’d go to see her again.

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.

The Mikaelsons find themselves out of options as they face the all-powerful and un-killable entity known as The Hollow. With the life of Hope at stake, Vincent proposes a final, desperate plan – one that will force Klaus, Elijah, Hayley, Rebekah and Freya to make the greatest sacrifice their family has ever endured. Season Finale.

Desperate to see her father Klaus after seven years, Hope resorts to drastic measures to bring her father back to New Orleans. Hayley attempts to minimize the fallout from Hope’s actions, but not before news of what she’s done ripples through the city. Meanwhile, Freya’s guilt over not being able to reunite her family gets in the way of her happiness with Keelin, while Rebekah struggles with her inability to fully commit to Marcel. Finally, struggling without Elijah by his side, Klaus’ murderous rampage throughout Europe leads to an unexpected encounter with Caroline Forbes.

As pressing matters rage on in New Orleans, the Mikaelson siblings find themselves forced to set aside their differences and work together to escape a "chambre de chasse."

Klaus turns to Davina for help to learn more about a mysterious affliction affecting Hope. On their wedding day, Freya and Keelin make a tough decision about their future together, while Elijah is forced to confront a past memory of Hayley. Finally, Declan’s growing curiosity in the city’s supernatural secrets forces Marcel to step in.

Intent on saving Hope's life, Klaus' plan will change the lives of the Mikaelson family forever.