Klaus returns to the French Quarter of New Orleans, a place where he helped build centuries ago. Now he sees that it has been taken over by his former protege Marcel. Camille, a psychology student, doesn't believe in supernatural beings. However, she finds herself drawn to Klaus. Meanwhile, Hayley and Elijah wait to see what Klaus will do next.

Klaus becomes angry over recent events involving the safety of his unborn baby and demands answers from Sophie. Meanwhile, gruesome remains are discovered in the bayou; and Davina reveals some shocking information about the witches.

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

Marcel and Rebekah fret over whether secrets hidden for nearly a century are about to be exposed. Father Kieran deals with a witch from his past. Hayley and her werewolf clan enjoy a party. Sophie discovers something shocking at the cemetery. Klaus takes some dangerous measures that will affect everybody.

A surprising enemy is confronted by Hayley. Klaus has some nightmares about his father and is forced to examine his own relationship with his adoptive son.

Hayley struggles with her powers. Marcel sides with Klaus and gets revenge over the wolves. Esther is busy plotting her own plans. Everyone wants control over the city.

Rebekah persuades Klaus and Elijah to take part in a family tradition from their childhood.

Vincent joins forces with a figure from his past. Kaleb is forced to make a difficult life or death decision, and Elijah finds himself in the fight of his life. Hayley and Jackson become pawns in Vincent's dangerous plan.

Ivy reveals some startling news to Klaus about the dark magic that’s been keeping him away from his family. Elijah turns to some unexpected allies to save Antoinette’s life.

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.

Intent on saving Hope's life, Klaus' plan will change the lives of the Mikaelson family forever.