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.

Determined, Rebekah is on a mission to get to the bottom of a recent, strange encounter involving Elijah. Davina convinces Marcel to let her attend an annual street music festival.

In the war between Klaus and Marcel, Rebekah stands against her own brother Klaus. The chemistry between Elijah and Hayley gets stronger. Klaus accuses his siblings of distrust and betrayal.

Klaus tries to get adapted to his new duties as he became the king of the city. He offers Marcel a compromise and he fixes his relationship with his siblings. Davina feels betrayed by Marcel. She finally finds an allay, Cami.

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.

Father Kieran finds himself in a great deal of trouble. Someone Marcel and Rebekah once knew threatens to expose secrets they've kept buried for nearly a century.

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."

Desperate to help Kieran, Camille insists on an unconventional treatment, but her good intentions lead Kieran to a violent episode. After Klaus and Elijah disagree over the best way to handle the Crescent Wolves, Elijah makes a trip to the bayou, where he is witness to a horrific explosion that only adds to the hatred and mistrust among the communities. While Jackson and Elijah work to save the wounded, Hayley learns a surprising piece of her family history from Marcel.

Klaus and Elijah enact a plan to collect the sacred stones needed by Genevieve in order to forever change the fates of Hayley and the werewolf community. Realizing that Klaus' plan will lead to the extermination of all French Quarter vampires, Marcel rallies an army determined to take down the Mikaelsons and regain control of the city. Davina warns Josh to leave town as she is forced to make a fateful decision that will turn the tide of war. Meanwhile, Francesca threatens Cami, who attempts to decipher a code that results in a surprising revelation among the city's factions.

As the baby's due date draws near, Klaus and Elijah embark on a search for Hayley, while Hayley determines to do whatever it takes to keep her unborn baby safe and away from the witches. Francesca takes a meeting with Oliver and Jackson to determine the future of the werewolves in New Orleans. In the aftermath of a surprising attack on Marcel and his vampires at the compound, Davina and Cami join resources to take down Klaus. Finally, in a desperate move to protect those most important to him, Klaus makes a heartbreaking decision.