While working a case of a nanny accused of abuse, Erin disagrees with the psychiatric consultant, Dr. Alice Dornan, regarding her diagnosis and punishment suggestion. Also, Eddie confronts her boss who has a personal vendetta against the commissioner and the Reagan family name; Mayor Peter Chase pushes Frank to make staffing changes he is skeptical about; and Danny goes undercover on a case when a woman claims to have heard someone plotting a murder.

After an EMT is shot and killed, Danny and Baez work to determine who is behind a chain of ambulance robberies. Also, Frank defends New York's homeless community after the mayor puts a new law in place; Erin tries to put away a violent perp after a judge rules he's not guilty, and Eddie offers to help Jamie pay off his student loans.