The squad delves into the death of a valued police officer, yet evidence suggests the victim may have been involved in shady dealings. Meanwhile, Dwight meets a tenacious internal-affairs investigator (Beau Garrett); and Rice pushes Whitehead to take a lieutenant's exam.

Dwight tries to locate a grief-stricken man's missing daughter---but the hunch is that she was the victim of a crime. Meanwhile, a big family development rocks Rice's world. And Whitehead is under the gun to refine his firearm skills, so he turns to an unlikely source for help.