With Nick on leave, Hank gets a new partner as he investigates the case of a seemingly mild-mannered accountant who is actually a vicious Wesen killer... with ties to the organization that killed Chavez. Meanwhile, Adalind moves in with Nick because she has nowhere else to go.

A man trying to kill a mobster is himself killed by a Wesen, and Nick and Hank determine that an old ritual is at the heart of the murder. Meanwhile, a mayoral candidate asks Renard for his support, Rosalee receives a letter from an old friend, and Nick and Adalind continue to adjust to living together.