Danny pursues Dickie Delaney, a con artist pretending to be the legendary singer Jimmy Buffett, after he's tricked into paying for the scammer's meal at an expensive restaurant. Also, Frank investigates NYPD Captain Terrell, who is using her badge to get free wares from local stores; Erin worries about her reputation when she's the subject of a salacious, anonymous police blog; and Jamie introduces a decades-old saluting rule in the precinct.

Frank contends with a potentially dirty cop within his ranks when Danny and Baez's investigation into a brutal assault on an NYPD detective reveals the officer may be corrupt. Also, Eddie and Badillo track down the culprits behind the theft of valuable rare works from a celebrated bookstore; Jamie begrudgingly joins Henry as he looks into an old friend's death he deems suspicious; and Erin snoops into the background of a new woman in Anthony's life.