Five years since the defeat of Klaus and the expulsion of the Mikaelsons from New Orleans, Marcel is the sole vampire king of the city. The witches and vampires are at peace in the Quarter. Vincent is troubled to hear of dark magic symbols appearing throughout the Quarter. Hayley has been travelling the country in search of a cure for the Originals. If she can find venom from all seven packs of New Orleans, she can find a cure to wake Freya, who will then have proper materials to wake the others
While under immense pain, Klaus is greeted by Cami's ghost who offers him motivation to fight and survive. Awaken, the Originals all feed and plan to free Klaus. Vincent helps Maxine look for her son Adam, while Vincent realizes that there have been reports of screaming, odd lights, and disappearing children throughout the Quarter in a manner similar to her son. Embarking on their plan, Rebekah confronts and stalls Marcel, Kol stalls Josh, Marcel's new right-hand man while the others rescue Klau
Klaus bonds with Hope. Freya is still draining the venom from Keelin. Hayley and Elijah jump back into their romance and have sex. Hayley questions her place in the family. Kol, distraught after losing Davina, is unsure where he wants to take his next steps but wants to explore the world. Vincent and Marcel investigate the disappearances of several children while Vincent sheds light on his backstory with Eva. She became pregnant with his child while Vincent turned to dark magic. The magic became
Hope is brought to Vincent to cure her, when he does, she ends up feeling worse. Vincent realizes they need to find the children who have been kidnapped to be sacrificed. Hope warns Klaus not to investigate the blue light. Hayley works with Marcel to find out where the kids have been taken, when they find that a werewolf had begun working with followers of the blue light to take back the city from Marcel, who is despised by the witches and werewolves. She blames the power of the blue light on so
Klaus and Marcel, under the influence of the Hollow, are driven to a dangerous game, tasked with killing each other. Freya successfully develops a knife to kill Marcel while growing closer to Keelin. Hayley visits Mary to keep Hope safe, where she learns that Mary's husband had journals including the serpent sigil that Hope has drawn and is all over town. Sofya and Dominic share that The Hollow was let free when Vincent, Davina, and Kol severed the ancestors' link. Hayley later begins to questio
Klaus and Elijah stage a party to learn who is in the cult of the Hollow. Vincent learns that The Hollow emerges every few years, and when it does it commits murders in four different areas. Sofya and Josh search for Marcel, who is still being held in the basement. Hayley has Freya use dark magic to allow her to view her parents murder, looking for the connection to the Hollow. She sees her father drop a key in the floorboard, which takes her to a warehouse where she locates a set of human teeth
Dominic stabs Sofya with the Tunde Blade. Freya places a boundary spell on the compound. Elijah forces Vincent to perform another Harvest Girl ritual to link with the ancestors and trap the Hollow. Freya teams with Josh to trap Dominic and learn where the other remains are. Dominic only knows that the bones were long protected by guardians. Dominic threatens Keelin; when an angered Freya confronts him, he kills her and the protection spell fails. Vincent and Elijah's ritual goes awry, leading Vi
Hope hears voices telling her that she and Hayley are connected to what is happening. The Ancestors send a warning. Alaric Saltzman heads to New Orleans with an item from the Lockwood estate. The search for the bones becomes a priority, and Marcel and his vampires join the Mikaelsons in searching. Sofya/The Hollow returns to Marcel. Hayley and Klaus meet with the Harvest girls who send them to talk with Davina who explains the history behind The Hollow. Davina takes Hayley and gives her informat
The Hollow has poisoned and imprisoned Elijah. Hayley raises the alarm that Elijah is missing, and Klaus confronts Marcel. Freya continues to woo Keelin, who promises to stand by her side. Freya, Klaus, Marcel, Vincent and Hayley meet to make plans to finish the Hollow. Vincent's plan requires Elijah's death, which angers Klaus. Freya and Vincent search for a loophole. The Hollow reveals to Elijah that only Hope has the power to truly destroy her. Klaus offers himself as a sacrifice in Elijah's
Rebekah and Kol are partying when vampires around them begin dying. They realize these vampires are from Elijah's sire line and return to New Orleans. Marcel and Josh work to revive Sofya. Inadu massacres the witches who had followed her. She tells Marcel that she can heal Sofya if he pledges loyalty before attacking him. Rebekah, Kol and Klaus hunt for the poisonous rose thorns in order to destroy them. Kol becomes angry when he finds that the Ancestors are back and goes looking for Davina. Hay
Kol refuses to lose Davina again and tries to find a way to kill Inadu without Davina dying. Inadu charges Kol with safeguarding her protection totem from the Mikaelsons. Freya realizes that Hope's blood is the only thing that will kill the Hollow. Rebekah asks Kol to help her locate the totem. Marcel joins the search and they are trapped by dark magic, realizing that Kol is involved, eventually blowing up the building that they are trapped in to escape. Time is running out for Elijah as the pen
Vincent is attacked, and the journal stolen. Elijah is angry because Hayley is avoiding him. Believing the Hollow has been defeated, the Mikaelsons continue their lives. Freya and Keelin get together. Marcel tells Rebekah the family has to leave New Orleans and that the kiss was a mistake. Sofya wakes from her coma and tells Marcel the Hollow is still out there. Vincent tells Klaus and Elijah the same thing. Elijah admits that Hayley will never accept him now she has been behind the red door. Th
Freya tries to find another way to lock the Hollow away forever. Vincent warns Hayley that once the ritual is complete, she will have to keep Hope far away from the Mikaelsons, to avoid the pieces of the Hollow recombining. After not getting a response from Kol, Freya considers turning herself into a vampire so the ritual can be completed, but luckily he shows up in time. The ritual is performed and the siblings part ways. Knowing that he could never leave Klaus's side, Elijah asks Marcel and Vi