Klaus's family has yet to forgive Klaus's actions. Klaus's old friend decides to show up and show him Chaos. While Elijah tries to hunt werewolves down to protect Hayley leaving Freya on nanny duty. Meanwhile Marcel's has organized another vampire community, while Davina is learning to control the coven as their leader only to find it's not as easy as it looks and seeks help from Hayley.

After discovering that poachers have begun taking out werewolves in the bayou, Elijah and Jackson grow concerned for Hayley's safety when she fails to show up during the full moon. Meanwhile, Davina, the only one with the answer to Hayley's whereabouts, plots ways to use that to her advantage. Elsewhere, Cami approaches Klaus with her theory on who is behind the series of murders in the French Quarter, while Lucien delivers to Elijah an unsettling warning about the war brewing among the sire lines. Finally, after receiving a dire prophecy about the future of the Mikaelson siblings, Klaus takes extreme measures to determine the validity of this potential impending threat.

Klaus seeks to take revenge for the taking of his baby, Hope, by Hayley and Jackson whom Elijah also seem to be against Klaus. Meanwhile Davina tries to lead her coven, and seeks help from Freya to bring Kol back. Hope is kidnapped, meanwhile Klaus is hostage at the attic.

Hayley and Jackson look after Davina after she made some enemies, meanwhile Elijah asks Marcel with help to do with Triston, Cami and Vincent keep an eye out for Lucien when things go awry; Klaus reunites with his old love and hears secrets he never would think of before now.

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. 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.

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.

Elijah learns that Aya might have knowledge about an elusive weapon that can take down Original Vampires for good. Davina receives a tempting offer which brings her closer to reuniting Kol.

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. Hayley and Davina also appear.

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. Hayley also appears.

After five long years apart, Klaus attempts to reconnect with his daughter, Hope. Elijah mediates a conflict between Hayley and Freya to determine the best way to protect the family.

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.