Portland and the Wesen world are busy places these days - Nick and Hank are trying to catch the Memory Eater (Gedächtnis Esser), needing the help of Trubel and her Grimm powers; Trubel lives up to her nickname in more ways than one; Wu remembers he's seen Trubel before her sudden appearance as Nick & Juliette's "criminology student" houseguest; the FBI (and an as-yet-unknown group of Wesen) are still trying to figure out how a rogue FBI agent (and Wesen) wound up beheaded in Nick & Juliette's house, pressuring Nick for answers; Adalind makes it to Vienna and the Royals, but her reception is not what she anticipated; Monroe and Rosalee aren't sure they can restore Nick's Grimm abilities; Juliette isn't sure they should; Captain Renard gets a surprise visitor while on his deathbed; and Adalind's theft of Nick's powers seems to have some unexpected side affects . . . . . .