Freya looks for a way to repair the bond between Klaus and Elijah, Hayley struggles with her curse, and Vincent and Cami help Detective Kinney when there appears to be a serial killer on the loose.
Jackson and Elijah become worried about Hayley's safety, Cami shares her theory on the murders with Klaus, and Lucien has an unsettling warning for Elijah.
Klaus and Elijah must work together to root out Lucien's true motives, Lucien reveals information about his past with Klaus, Marcel receives an offer from a mysterious figure, and Hayley tries to cope with her situation.
Elijah considers going to a gala thrown by a group of ancient vampires, Marcel receives an enticing offer from a mysterious woman, and Lucien and Klaus form a tentative alliance.
Klaus and Elijah plan a Thanksgiving gathering in hopes of negotiating a truce, Vincent and Marcel realise Davina might be in over her head, and Cami encounters a new threat.