The latest attack against Rosalee and Monroe makes Nick want to become a Grimm again more than ever. A group of Wesen use a stretch of highway for a horrific ritual.
Nick and Hank investigate a series of strange home invasions. Monroe has a Christmas surprise for Rosalee.
A woman claims a persistent talking wolf drove her to madness. Juliette and Nick weigh the potential costs of getting back his powers and threats against Monroe and Rosalee's marriage intensify.
A breakthrough in the investigation sends Detective Bird and Jane to the studio to question the show's production team; Pete goes on the attack in a rash display of emotion.
Jane gets a surprise phone call about who has Lake; Jane must find Gus so he can trace the call.