While Tang gets an update about the boy she shot, John wants her to come clean about what really happened. Ben tries to intervene in the life of a prostitute, but makes things worse.
Officer Cooper gets a new partner -- Jessica Tang; and Lydia has a new partner as well -- Ruben Robinson,
Tang and Cooper are attacked on the street, while Lydia and Ruben question the unassuming grandmother of a murder suspect. The force gets a new captain.
Bearing a grudge, Sammy leaves a gang territory unattended, only to have a violent gang war erupt throughout the city.
Jessica tries to help a homeless vet get an ID so he can be admitted to the homeless shelter. Sammy's determined to save a dog after he accidentally shot it in the leg.
Cooper tries to save a suicidal teen in a situation that hits close to home, while Jessica gets a visit from someone in her past.
Sammy tries to make amends after the murder of a young man who agreed to testify in one of his cases. John and Jessica find themselves babysitting a documentary film crew.
Jessica's day goes from bad to worse in a shootout. Sammy holds a grudge against Ben for not backing him up during an arrest.
Ben heads down a slippery slope as he attempts to help the daughter of a prostitute. Tang faces more questions about shooting an innocent bystander -- which could affect her future.
Tang prepares to move on to a new precinct, but first she wants to tie up some loose ends on the beat. Lydia is pressured to make a decision about her future.