There’s a nervous tension in the air on Judgment Day for all the rookies at 15 Division who will have to undergo make-or-break assessments by Staff Sergeant Frank. But after the death of an unidentified girl at a house party – an emotionally harrowing experience that pushes all of her buttons – Andy begins to question whether she has what it takes to be a copper and contemplates handing in her badge.

A local car dealership is the backdrop for a Division 15 sting operation to crack down on suspects with outstanding warrants. However, when one of the captured criminals tries to bargain for a lighter sentence by offering insider information to Dov and Chris, it puts them in peril in a booby-trapped meth house. Meanwhile, Jo convinces Luke to help her on a high-stakes surveillance job. Trapped together in a hotel room, the two detectives finally have it out over their past, raising the question of whether they are really finished

Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.

A chaotic night at the station leads to an investigation by Internal Affairs; Gail struggles to recover from her harrowing abduction; Andy discovers a secret about Nick's past.

During a routine traffic stop, Gail and Andy find a teenage boy bound and gagged in the trunk of a car; Oliver, Chris and Swarek track a gunman.

The squad searches for Chris' son Christian after he is kidnapped.

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.

Oliver prepares Andy to defend herself at Duncan's dismissal hearing.

Dov and Andy cover a music festival where a girl ends up dead due to drugs. Gail goes to court and is unsure whether lying for her brother is the right thing to do. Nick gives Juliet another chance.