The law is just a suggestion.
The story of an inner-city Los Angeles police precinct where some of the cops aren't above breaking the rules or working against their associates to both keep the streets safe and their self-interests intact.
Vic challenges Shane and deals with threats to his family; a federal agent arrives in Farmington to investigate a recent wave of violence.
As a local gang war heats up, Vic positions himself as a valuable commodity to the warring parties; Corrine and Cassidy confront Vic.
Vic works an angle to make himself valuable to the Armenian mob; Corrine finds herself in a surprising legal jam; Tina targets a producer of adult entertainment.
The gang war erupts in unexpected ways that Vic cannot control; Dutch and Billings' homicide investigation grows into something more disturbing; Cassidy reaches out to Danny.
Claudette encounters a murderous old nemesis; Vic confronts Olivia about her political connections; Dutch's case gets personal.
Vic sets into motion plans to end the gang threat as his relationship with Cassidy deteriorates; Dutch and Billings investigate a possible sleepwalking murderer.
A prostitute from Vic's past is the key to taking down a violent drug dealer; Dutch worries about Claudette's health; Danny takes drastic measures to protect her child.
A local priest may be protecting drug dealers; Dutch and Billings close in on attempted cop killers; Corrine learns uncomfortable truths about Vic.
Vic closes in on Shane, Mara and their sick young son; Claudette dismantles the Strike Team; Pezuela offers Acevada "assistance" for his mayoral campaign; Rita Denton (Frances Fisher) comes on to Dutch; and Billings' ex-wife and daughter are fearful when a registered sex offender moves into their neighborhood.
Vic and Ronnie are using up every last method, illegal or otherwise available; to find Shane. Mackey assures Aceveda that he still the main player to to take down Beltran as Pezuela connection. Corinne makes a decision about the last call with Mara. Meanwhile Aceveda has to prove himself to someone.
As everything falls into place for the sting operation to bring Vic down, Shane is desperate for money. Back at the Barn, Ronnie tries to intercept a blackmail package, and Aceveda begins to question Pezuela's "suicide."
Olivia joins forces with the Strike Team to catch a Mexican drug king and his shipment. Meanwhile, Dutch cleans up Billings' mess, and the death of a woman associated with the Strike Team prompts an investigation by Claudette.
As Vic hopes his immunity deal will help keep his family together, and Shane takes extreme measures to keep his pregnant wife from being charged with murder, Dutch finds he's a suspect in the disappearance of a teenage serial killer's mother.
