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

With Hope facing a life-threatening affliction and deteriorating quickly, Klaus travels to Mystic Falls to seek help from Caroline. Tasked with keeping Hope preoccupied in Mystic Falls, Elijah comes to a heartbreaking realization about his niece. Meanwhile, at the Salvatore School for the Young and Gifted, a run-in with Alaric Saltzman throws a wrench into Klaus’ plan.

Vincent joins forces with a figure from his past. Kaleb is forced to make a difficult life or death decision, and Elijah finds himself in the fight of his life. Hayley and Jackson become pawns in Vincent's dangerous plan.

With time running out, Klaus' ultimate plan to protect baby Hope at all costs continues to take shape.Source: CW

When a dangerous affliction threatens to expose one of her siblings, Freya searches for a way to reverse the crippling curse even as she finds herself the target of The Strix's latest plan. Elsewhere, Klaus keeps a watchful eye over Cami while she attempts to help Detective Kinney, whose life has begun to spiral out of control as a result of Lucien's compulsion. Meanwhile, a confrontation with Marcel causes Vincent to reevaluate his decision to stay out of witch business, and Hayley's attempt at a quiet Christmas with Jackson and Hope results in an unexpected surprise.

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 order to show Elijah that her plan is what's best for him, Esther forces him to relive a time long ago when he loved a young woman named Tatia.

With the knowledge that he has been betrayed by his siblings, Klaus and an unlikely friend plan to get even with them.

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).

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.

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.

In the aftermath of a horrific plan that left Cami dead, Klaus declares war on Aurora and Tristan. Elsewhere, Vincent, who has resumed his role as Regent to the New Orleans witches, is forced to use his magic against his will, while Hayley and Jackson ind themselves pawns in Tristan’s twisted game. Finally, after learning that Tristan is in possession of a powerful weapon that could take their family down once and for all, Klaus, Elijah and Freya enact a risky plan that leads to a tense showdown with The Strix.

As Vincent, Marcel and Josh work to clean up the city, an uprising of purist vampires leads the supernatural factions into a deadly showdown. Hope's attempt to bring her family back together leaves her struggling with the consequences. Finally, Freya makes a life-changing decision.

Hayley atempts to save her unborn baby from the witches. Francesca meets with Oliver and Jackson to decide the future of the werewolves in New Orleans.

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

Davina takes Mikael to a cabin to heal from his wolf bites. Klaus searches for them. Elijah, Marcel and Hayley try to rescue some young wolves.

When Elijah and Freya realize that Rebekah may be the target of The Strix's latest plan, they do whatever it takes to protect her. Elsewhere, Klaus spends time with Aurora to figure out where her loyalties lie, while a dangerous run-in with a member of The Strix leads Hayley and Marcel to make an unsettling discovery. Finally, an elaborate scheme created by Lucien leaves Cami faced with a difficult decision to make and Detective Kinney fighting for his life.

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.

In the immediate aftermath of having his memory erased by Marcel, Elijah awakens to find himself in the middle of nowhere and without a clue as to who he is. Unable to control his instinctive vampire ways, Elijah encounters Antoinette, a beautiful and free-spirited vampire, who helps him navigate his new life. However, a run-in with Klaus threatens to destroy the peace he’s finally found.

Rebekah and Marcel have been trying to keep a secret from Klaus which may come to the light as we flashback to 1919. Elijah and Monique bond. Hayley takes Sabine hostage to try and get information on reversing the curse on her clan.

Hayley struggles with her powers. Marcel sides with Klaus and gets revenge over the wolves. Esther is busy plotting her own plans. Everyone wants control over the city.

Rebekah is on the run with baby Hope.

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

Finn captures his brother's spirits, while the vampires remain trapped and their hunger grows.

Rebekah becomes interested in a girl. Hayley struggles with coming clean and is surprised by something Jackson admits. Klaus learns something and heads to confront Hayley. Vincent sets his eyes on Marcel for answers to what Klaus is hiding.