Ranchhand John is killed while accidentally bumping at night into Vincent, a blue-fluorescent feral performing one of the 27 raids on cows that went from Nebraska to Portland, actually harvesting bovine ovaries for his pregnant mate Jocelyn, with whom he keeps moving and hiding. Besides Nick, the case seems to be followed only by an 'ufologist' or alien-hunter, who in fact chases the very feral species. Monroe recognizes the print Nick made from his key as part of a medieval map as Swabia, Renard explains the keys combine into a map to a terrible treasure hidden by seven crusader Grimms. Juliette swears Monroe to secrecy, being insecure about her reemerging love memories.

The legend of the Lake Monster 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 her. Elsewhere, Capt. Renard continues to support a candidate for mayor. Meanwhile, Nick is shown the scope of the Wesen uprising as the secret government agency takes him into the heart of their Portland operations center.