Frank proposes to Noelle. Andy works a bank robbery case with Swarek on her first day back at 15. Dov attempts to help an attractive Italian women whose passport has been stolen.

Andy is partnered with Swarek's new girlfriend, Officer Marlo Cruz. When they come face-to-face with an out of control EDP [Emotionally Disturbed Person], their differences are put to the test and one of them has to pull the trigger.

After a messy drug arrest, Andy and Marlo are quarantined together. Meanwhile, 15 Division springs into emergency response mode in order to get the contaminated drugs off the streets before a deadly outbreak sweeps through the city.

After Andy and Chloe take fire from an unseen shooter, the officers realize they are the targets of someone with a grudge against 15 Division. They must continue to serve and protect while in the line of fire.

In the wake of a targeted attack on the officers of 15 Division, Andy, Swarek, and their fellow officers have to piece together the truth about a past crime in order to find Oliver Shaw - in time to save his life.