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.

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.