When Eddie and Jamie become overly involved in a complicated adoption case between the birth and adoptive parents, they ask Erin to help them settle the dispute without going to court.

Danny and Baez investigate the murder of a single mother whose ex-husband has a history of violence. Also, Frank deals with the fallout when Mayor Dutton eliminates solitary confinement in prisons, and Jamie’s efforts to save a young woman who overdosed on drugs has unexpected consequences.

Danny considers taking a new job that would ease his financial struggles after investigating the death of a wealthy man. Also, Nicky tries to avoid involving her family when she is sexually harassed by her boss at her new internship, and Garrett advises Frank to regain the public's trust after a rookie cop is caught on video questioning a pedestrian's immigration status.

Frank locks horns with a data-tracking company when it refuses to unlock a terrorist's phone that may hold information regarding upcoming targets; Erin obtains information about an impending murder from a shady source; a woman kidnaps a baby.

When New York City experiences a major blackout, police officers scramble to contain the resulting chaos. Frank uncovers some unpleasant truths about his department. Jamie and Eddie question the line between work and their relationship.

A former officer waits on Frank at a restaurant, causing him to feel guilty about the circumstances surrounding why she was fired, and he tries to reinstate her. Also, Danny and Baez investigate the murder of a star college basketball player linked to sports betting, Erin seeks justice in an apparent DUI, and Jamie and Eddie pick a wedding venue.

After an incident where Officer Witten’s backup physically could not keep up with a chase, Frank must decide whether to implement a more rigorous fitness test for the NYPD. Also, Danny is hesitant to pursue a cold case after learning who the original detective was; Anthony begs Erin to stall a murder trial so he can gather more evidence; and Eddie is vexed by Jamie’s disapproval of her joining a fraternal organization.

Frank is conflicted about how to deal with former cop Rick Austin’s gripe about his pension. Jamie helps a friend, Connor O’Brien, deal with illicit pictures of his daughter on the internet. Danny hunts down a killer who shot his online prison pen-pal. Anthony confronts the realization that his foster son, Sam, might not be suited for police work.

After an EMT is shot and killed, Danny and Baez work to determine who is behind a chain of ambulance robberies; Frank defends New York's homeless community after the mayor puts a new law in place; Eddie offers to help Jamie pay off his student loans.