With a dire prophecy looming over them, Klaus and Elijah invite Lucien, Tristan and Aurora to a Thanksgiving gathering in an attempt to negotiate a truce. When Aurora reveals that she has powerful leverage over Klaus, Hayley and Freya take matters into their own hands, leading to a deadly three-way confrontation. Elsewhere, Marcel and Vincent are forced to take drastic measures when they realize Davina may be in over her head, and Cami finds herself face-to-face with a dangerous new threat.

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).

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.

Desperate to save her daughter, Hayley turns to Marcel for help uncovering information about the mysterious force that has set its sights on the children of New Orleans. While Klaus remains behind with Hope, Elijah and a reluctant Vincent join the hunt, which puts them on a dangerous collision course with an unlikely new threat. Finally, Freya and Keelin must put aside their differences as they embark on a journey that may alter the power dynamic in New Orleans forever.

When The Hollow sends a terrifying message to Vincent, he must team with Haley and Freya to embark on a desperate mission to stop the Hollow once and for all - even if it requires a heartbreaking sacrifice. Refusing to allow anyone in his family to pay the high price of defeating their enemy, Klaus makes a surprising alliance and enacts a plan that threatens to change the Mikaelson family forever.

Frustrated by the lack of progress made in the search for Hayley, Klaus turns up the heat by taking hostages from each of the three New Orleans supernatural factions. Freya goes to Mystic Falls to check on Hope, who has been sent back to the Salvatore School. Vincent seeks guidance from Ivy after learning that Klaus’ erratic behavior is escalating.

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."