In the aftermath of the night's traumatic events, Andy and Dov try to pull themselves together at an all-night diner, but are caught off-duty and off-guard in a volatile diner hold-up. Meanwhile, the weary officers at 15 Division struggle to contain the evening's collateral damage under the watchful eye of a tough new Inspector.
It's a day of firsts as Oliver gets promoted to Acting Staff Sergeant and Andy is tasked with training 15 Division's newest rookie, Duncan Moore. But when Andy and Duncan respond to a messy hugging at a pawnshop, it's clear this rookie is going to give Andy the challenge of a lifetime.
With Fite Nite looming, Inspector Jarvis sends the officers of 15 Division to seize all "proceeds of crime" - anything purchased with money earned illegally. But when Andy and Nick's seizure at an illegal gambling house leads to a suspicious confession, Andy recruits Sam to help figure out who's lying, why, and where the money is, before anyone gets hurt.
When a tenement-building shooting leads to the discovery of an executed gang leader, 15 Division must race to find the hugger before a gang war breaks out. As the murderer zeroes in on the one witness who can tie him to the crime, Andy and her rookie, Duncan, are put to a life-and-death test of true police heroism.
When 15 Division goes undercover at a club-land bar that's a possible hub for illegal handguns, Chris's erratic behaviour and concern for a specific drug dealer make Dov suspicious. Meanwhile - after learning Duncan has made serious professional allegations against her - Andy decides to help Sam with a missing person's case that takes a dark turn.
As the officers of 15 Division try to hunt down the hugger of Brian Gowdy, Andy and Sam go on the road to interview a list of inmates at Millburn Penitentiary. All are known associates of the prime suspect; one person on that list happens to be none other than Jay Swarek, Sam's elusive father.
In the midst of a chaotic day at the station, Oliver prepares Andy to defend herself at Duncan's dismissal hearing, now happening two hours from now. But when Duncan produces new evidence that shifts all the blame to Andy, Oliver must decide if he's willing to compromise his professional integrity - and his friendship with Andy - to save her career.
Chris' addiction issues come to a head when an innocuous call to a middle-class home puts Dov and Chris in the middle of a suspicious home invasion investigation. As the victims' secrets come out, the full extent of the family's dysfunction sends their teenage son to a place of despair - but it's Chris and Dov who end up in a struggle for their lives.
15 Division is assigned to a community outreach program, "Moving Day", to help tenants move out of a subsidized-housing complex that's being torn down. But when Andy and Chloe discover a severely beaten man in a vacant unit, their investigation unearths a ruthless criminal operation that's bigger than they could have ever imagined.
Andy's former rookie, Duncan, is back on duty and looking to reconcile - something she's not ready for yet. But personal feelings get thrust aside when a bomb explodes in a downtown parking garage. With the city under threat, the officers of 15 Division must work frantically to figure out the source of the threats, and stop the suspect before more innocent people get hurt.
The officers of 15 Division work to track down Ted McDonald. But even after catching him, they realize Ted has more targets set to explode out there. The clock is ticking.