After tracking a handgun found at a frat house brawl, 15 Division decides to go undercover at the club-land bar that's supplying the illegal handguns. During the undercover operation, Dov can't help but notice Chris's jumpy, nervous behavior - and when Chris goes to extreme lengths to ensure a specific drug dealer walks away without charge, Dov is left wondering just what exactly is going on with his friend. Meanwhile, Andy is devastated to learn that allegations made by her flamed-out rookie, Duncan, means she has to sit out the night's activities. Andy offers to help Sam with his missing person's case, which then takes a dark and unfortunate turn.