Danny and Baez investigate the death of an elderly woman who was shot in her home by a stray bullet. Also, Frank faces ridicule from his department when he disciplines a disrespectful cop, and Erin steps in to help her detective, Anthony, find a legal solution to a case that’s personal to him,

Business becomes personal for Frank and his 1 Police Plaza team when Baker is assaulted on the street, as well as for Erin, when she asks her ex-husband, Jack Boyle, to represent a defendant she’s prosecuting. Also, Eddie wonders if she’s being too stubborn after she publicly undermines one of Jamie’s decisions at work, and Danny and Baez investigate the attempted murder of a couple with huge secrets.

Frank, Baker, Garrett and Gormley experience feelings of guilt when Detective Angela Reddick (Ilfenish Hadera), an officer they briefly worked with at 1PP, is shot after Frank reassigned her for not meshing with their team. Also, Eddie, Danny and Baez investigate a man’s murder after Eddie and her partner respond to an altercation between the victim and a neighbor, and Anthony finds himself at a crossroads when he’s offered a promotion that strains his relationship with Erin.

Danny reunites with Mickey Patrick, his childhood friend and a former criminal, who comes to him for help finding his missing fiancee; Anthony surprises Erin with one last stakeout before her run for district attorney.