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.

At the re-opening of St. Anne's Church, Father Kieran finds himself in a great deal of trouble after a run-in with a witch from his past. Marcel and Rebekah grow concerned when the reemergence of someone they once knew threatens to expose secrets they've kept buried for nearly a century. Elsewhere, Sophie is shocked when a discovery is made at the cemetery, but she soon realizes things may not be as they seem. With the full moon looming, Hayley lets Rebekah in on her plan to throw a party for her werewolf clan, but things take a dangerous turn when uninvited guests arrive. Meanwhile, Cami is conflicted when she makes a difficult decision involving the safety of Father Kieran, and Elijah finds himself facing his own dilemma when he has to choose between Hayley and his siblings. Finally, when one of his plans fails, Klaus takes drastic measures in the Cauldron, resulting in dangerous repercussions that affect everyone involved.