In a routine sweep to nab every outstanding suspect, the detectives divvy up the warrants. But when they cast their nets, they bring up far bigger fish than expected.

Allegations against the Strike Team are front-page news, and the team is broken up pending the investigation. Vic and Claudette find themselves following the trail of a meth batch, while Shane and Dutch attempt to get along on a case.

Vic and the Strike Team mediate a dispute between Rondell Robinson and the Nation of Islam while Dutch and Claudette investigate a brutal home invasion in the Korean community.

While Vic searches for his wife and children, the Strike Team allow more drugs into Farmington through a corrupt connection. But when their latest shipment turns bad, the Team heads to Tijuana to uncover the person behind the poisoned cocaine. Meanwhile, Dutch and Claudette try to track down the man responsible for fire-necklacing the leaders of two separate gangs.

Detectives Wagenbach, Mackey and Wyms investigate a massacre at a women's shelter, and Captain Aceveda works with Lowe on the case of a stolen bicycle.

Flashback to the first day of the barn. Under pressure to get results, Vic and his new Strike Team make an impression on the streets. Dutch and Claudette realize they make a good team, and David discovers he doesn't have as much power as he thought he would.

While the Strike Team puts the finishing touches on the money train take down, Vic goes it alone and works with Dutch and Claudette to find a missing kid. David gets an unwanted visit from the Chief and Julien receives an unpleasant surprise.

The newly arrived Decoy Squad and the Strike Team go head to head in the investigation to solve a car-jacking case. Dutch gets in over his head on an attempted murder case.

During a routine bust on bangers, Vic and the Team discover a money laundering ring that reaches far and wide in the crime community. Meanwhile, Dutch takes the chilling confession of the man who was arrested in the serial-rape case, and Danny goes undercover.

When Aceveda confirms that the Strike Team is the target of an Armenian mob hit, Mackey must take matters into his own hands. Meanwhile, Whym's career is on the line when she disobeys Aceveda's orders to put a case to rest that may prove the innocence of convicted felons.

Vic is no longer the cop he used to be, acting adrift after his past actions have caught up to him. The strike team has been dissolved, leaving Mackey to menial busts that keep him off the streets. When Aceveda moves on to his new City Council position, Captain Monica Rawling takes over the Barn and empowers Vic to implement her controversial anti-gang policies.

Monica and Vic rush to get their informants off the street after two C.I's are found brutally murdered. Meanwhile, as Dutch and Claudette investigate a brutal beating and robbery, a case from the past forces Dutch to take one in the line of duty. Plus, Vic suspects he's being set up when Shane comes to him after his situation with Antwon and Halpern spins out of control.

Monica, Vic and the strike team work together to put Antwon Mitchell back behind bars after his deal with the DEA released him from prison. When Vic reveals his suspicions of David's connection to both Antwon and an inmate's murder, David must protect his political future at any cost. When the murder of an over-protective father leads Claudette and Dutch back to a foster home they had previously investigated, Monica makes an unpopular decision that helps seal her fate.

The Strike Team tries to develop a strategy to deflect the Internal Affairs investigation as Vic finally comes face to face with Kavanaugh. Meanwhile, Tina goes undercover to help take down a sex-trafficking ring; and friction between Claudette and Dutch deepens when she reopens one of their past cases.

The Strike Team attempts to make bail for Lem who is now in jail, but they discover that Kavanaugh has frozen their accounts. Claudette returns to work to help Dutch investigate the murder of a man who’s body was found in the dumpster. Meanwhile, Tina jeopardizes her future at the Barn after she endangers the life of an undercover detective. Corrine confronts Danny about Vic’s unfaithfulness and the identity of the baby’s father.

After being badly beaten, Shane's life spirals even more out of control as his guilt continues to eat away at him and his marriage begins to fall apart. Vic and Ronnie try to learn who was responsible for Shane's attack. Meanwhile, under the new leadership of Kevin Hiatt, Claudette assigns the Strike Team to investigate the San Marcos murders. Dutch and Billings make progress in a serial rapist case.