When a mysterious disappearance brings Klaus back to New Orleans, Hope looks forward to the prospect of seeing her father again. However, when the dark magic that had been keeping them apart begins to manifest in dangerous ways across the city, Vincent turns to Ivy for guidance about what it may mean. Elsewhere, Marcel returns to New Orleans amidst increased tensions between the supernatural factions, while Freya makes a decision about her future with Keelin. Finally, Roman's surprise visit to the Mikaelson compound forces Hope to reveal some dark truths about her ...
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.
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.
A mysterious clue sent to Klaus (Joseph Morgan) leads him one step closer to finding Hayley. Antoinette (guest star Jaime Murray) opens up to Elijah (Daniel Gillies) after her past comes back to haunt her. Meanwhile, Marcel (Charles Michael Davis) makes a decision that puts him at odds with Klaus. Finally, Hope (Danielle Rose Russell) takes matters into her own hands to fix the mess that she's created.
Vincent, Marcel and Josh work to clean up the city, when an uprising of purist vampires leads the supernatural factions into a deadly showdown. Hope faces the consequences of trying to bring her family together. Freya makes a big decision.
Klaus helps Hope cope with her pain in an unconventional way. A figure from Elijah's past comes back seeking help. Elsewhere, Marcel takes on the nightwalkers, while Vincent deals with the fallout of a fateful decision.
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.
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.