While investigating a gruesome homicide, Nick (David Giuntoli) learns that a seemingly mild-mannered resident could be festering a potential monster created from a dark childhood. Meanwhile, Monroe (Silas Weir Mitchell) is sent an unsettling message by the creature community, who are beginning to wonder if his priorities lie with them or a Grimm. Russell Hornsby, Bitsie Tulloch, Sasha Roiz and Reggie Lee also star.