Freya looks for a way to repair the bond between Klaus and Elijah; Hayley struggles with her curse; Vincent and Cami help Detective Kinney (Jason Dohring) when it appears there is a serial killer on the loose.
Klaus and Elijah must work together to root out Lucien's true motives; Lucien reveals information about his past with Klaus to Cami; Marcel receives an offer from a mysterious figure; 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; Lucien and Klaus form a tentative alliance.
Jackson and Elijah become worried about Hayley's safety; Cami shares her theory on the murders with Klaus; Lucien has an unsettling warning for Elijah.
Elijah and Freya do whatever it takes to protect Rebekah; Klaus tries to determine where Aurora's loyalties lie; Hayley and Marcel make a disturbing discovery; Detective Kinney (Jason Dohring) fights for his life.