Peter and Sam travel to a prestigious private high school in Bellevue, Washington, to document the story of a filthy vandal called the “Turd Burglar.”

A local legend comes back to life as Nick and Hank investigate a mysterious sighting linked to a tourist’s death at a local lake. Rosalee’s past comes back to haunt…

As Nick delves into the trailer’s weapons cabinet and his inner Grimm, the investigation of a dead construction worker leads him into a long-standing conflict in the creature world.