A single-camera ensemble comedy following the lives of an eclectic group of detectives in a New York precinct, including one slacker who is forced to shape up when he gets a new boss.
When Sal's Pizza burns down and the fire marshal quickly assumes that the owner is the prime suspect in the investigation, Jake does everything in his power to prove him wrong, even if it means stepping out of his jurisdiction. Meanwhile back at the precinct, chaos ensues when a computer virus publishes everyone's browser history.
Jake's dream comes true when he gets to spend the day with his hero, Jimmy Brogan, a former crime reporter. But the dream becomes a nightmare when Jake’s comments about Holt and the precinct are considered "on the record." Meanwhile, Terry and Charles try to teach Rosa how to be less terrifying on the witness stand.
When Jake makes an arrest without a lot of proof, he only has 48 hours to collect evidence, or else the "perp" will be released. After his unsuccessful interrogation of the suspect, Jake forces his co-workers to spend their weekend helping him crack the case. So, while the team is stuck at the precinct, Charles judges a pie contest between Gina and Rosa, and Holt helps Terry look better in the eyes of his in-laws.
It's Halloween night, a busy time of the year for any police precinct. Amy detests the holiday, and is not thrilled when she has to don a costume to go undercover on street patrol with Charles. Back at the precinct, Jake bets Captain Holt that he can steal his Medal of Valor before midnight, which results in him bringing out some costumes of his own.
A detective from Special Crimes, takes over Jake’s nearly solved murder case and steals his thunder. Over a few drinks, Jake enlists the precinct to get revenge and find the murder weapon before “The Vulture” does. Across town, Captain Holt and Gina help Terry get re-certified to carry a gun.