A double homicide leads Nick and Hank to a traveling carnival where the performers are not what they seem. To get a better understanding of what's going on behind the scenes Monroe and Rosalee go undercover. On the wedding front, Monroe has a really important question for Nick. In Austria, an invaluable member of the Resistance makes the ultimate sacrifice to help Adalind.

When the severed head of a young man is found under a bridge, Nick and Hank find themselves on the case of Japanese Wesen acting on an ancient tradition of revenge. Elsewhere, Adalind decides to go back to work at her old law firm and has her first face-to-face with Eve.

Nick, Hank and Wu investigate a local hotel after a grisly murder leads to one of its guests who claims to be haunted by a frightening creature in the night. At the Spice Shop, Monroe, Rosalee and Eve continue to research the origins of the symbols on the cloth and may be getting closer to unlocking its mystery. Meanwhile, Capt. Renard continues to be haunted by his past transgressions.