Last season, these five rookies hit the streets for the first time with their training officers watching their every move. Now, the training wheels are off; they're more experienced and ready to kick some serious butt. But they are also realizing that when it comes to getting good at this job, there are no shortcuts. And when you're a rookie officer, a little knowledge is a dangerous thing. In their first seven months as first responders walking the proverbial beat, they've learned how to be cops.
Andy butts heads with Division 15's new detective when they both investigate a shooting at a concert.
Andy and Gail go under cover at a drug-riddled club; Traci struggles with her feelings for detective Barber; a woman files a complaint against Dov.
Andy and Swarek investigate the theft of severed heads for a medical lab; Andy puts Luke and herself in danger.
As the cops try to recover from an explosive event, they must also investigate a series of arsons; a man from Chris' past emerges.
Chris and Dov are trapped in a dangerous meth house during a sting operation; Luke helps Jo with a surveillance job in a hotel room.
A gang is involved in the murder of a police informant; Det. Rosati reveals something that puts Andy's relationship with Luke in danger.
Andy worries her personal problems are affecting her professionally when a woman is brutally attacked on her watch.
Division 15 is placed under quarantine when a man collapses from a mysterious illness; Dov's date with a bomb technician ends unexpectedly.
Gail and Dov work with Swarek as they try to protect an informant from a dangerous gang; Chris and Andy participate in equine training.
Andy and Swarek come across a car accident while pursuing a child and his kidnapper; Chris fights with Dov; Andy worries life is passing her by.
An undercover training exercise challenges Andy, Dov and Traci; Gail and Chris find a teenager tied up at a graveyard.
A vigilante steals Gail's uniform from her car; Andy and Sam's inability to stay away from each other endangers Swarek.
Andy tries to uncover what happened to Swarek -- who is being held captive by a gangster.