Klaus Mikaelson, the Original vampire/werewolf hybrid, returns to the magical melting pot that is the French Quarter of New Orleans - a town he helped build centuries ago.

Rebekah arrives in New Orleans at her brother Elijah's insistence, but, concerned that Klaus is up to no good, she seeks help from a reluctant Sophie. Marcel enlists Davina's help.

Betrayal at the masquerade ball? Klaus and Rebekah come together to attempt to unravel Marcel's empire from within, in spite of Elijah's concerns. They enlist help from Sophie.

When Klaus discovers Hayley's life is being threatened, he goes to extreme lengths to protect her and their unborn baby. Cami turns to Father Kieran for guidance when she is having a difficult time dealing with the tragic events of her past. Feeling as though he can trust no one, Marcel visits an old friend to seek out some advice, while Davina takes steps to learn how to control her magic. Finally, Klaus delivers some surprising news to Father Kieran.

As the French Quarter prepares for its annual celebration of the Casket Girls Festival, Cami suffers through as Davina attempts to free her of Klaus' mind compulsion. Elijah and Marcel form an unlikely alliance as Klaus sets his plan in motion to get Davina back. Once it's known that Davina is missing, Sophie gets in on the hunt to track her down. Meanwhile, Hayley is forced to make a tough decision after receiving an unexpected phone call, and Rebekah sets her own plan in motion when she enlists the help of someone from Marcel's past.

When Davina becomes violently ill and the repercussions soon begin to affect the entire French Quarter, Marcel, Klaus, Elijah and Rebekah rush to find out what is going on. Sophie approaches the others with some startling information about the Harvest Festival and presents a drastic plan to save Davina. Elsewhere, Hayley is racked with guilt as she comes clean to Elijah about her role in Sophie's plan. Last, a sequence of unforeseen events sends shockwaves through the French Quarter.

Marcel, still angered refuses to help Klaus when a gruesome discovery is made. Rebekah is on alert when she uncovers the remnants of a sacrifice down by the docks realizing it's the work of a dangerous warlock from their past. when Elijah gets some information that Rebekah may be in trouble, he and Hayley set off to find her. Camille confronts Marcel, who opens up and shares some details of his past with her, but things quickly spiral out of control when an unexpected visitor shows up. Finally, a violent confrontation ensues when Klaus faces off against a powerful force with an unmatched advantage over him.

In a series of flashbacks to 1919, Klaus opens up to Cami and reveals details of the devastating secret Rebekah and Marcel were trying to keep from him. Elijah forms an unlikely alliance with Monique and asks for her help in locating Sabine. Elsewhere, Thierry is reluctant to get involved when Marcel and Rebekah approach him with a plan to take down the witches. Meanwhile, in the bayou, Hayley is at her wits' end and holds Sabine hostage in an attempt to get information that will reverse the curse on Hayley's werewolf clan.

Elijah is taking control of the quarter and receives a surprising offer, and they know how to throw a party.

"Genevieve asks Elijah to allow her coven to publicly celebrate a traditional feast day, where members of the community offer the witches gifts in return for blessings. Monique and Genevieve disagree over what the ancestors want from them, and Genevieve reveals her plan to build the witches' power. When Elijah focuses his attention on restoring their home to its former glory, Klaus accuses him of doing it only to impress Hayley . Next, Klaus sets a new plan in motion by finding Cary , a werewolf from his own line, and sending him off to find a missing piece of family history. Marcel lets Thierry in on his new plan to rebuild his power, but Diego has his own ideas about the future. At the Feast of the Blessings, Monique and Genevieve try to use the ceremony to teach Davina a lesson, but Klaus intervenes and gives Davina a surprisingly important gift. While Hayley struggles to decide where her loyalties should lie, the ceremony explodes into violence."