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

Grade school heroin dealing prompts Vic to increase his efforts to bring down Armadillo, while Dutch and Claudette help a woman track down her Alzheimer's-addled mother.

Vic and the Strike Team begin to prepare for the money train takedown, even though Armadillo's greenlight still has them on their toes. After embarrassing the department with the Bob and Marcy case, Dutch is forced to take any action necessary to prove himself in a new homicide, while Vic sets out to stop the abuse of a neighbor by her violent boyfriend, and Danny finally makes a stand against Yassirah.

With Ronnie's face healed, he comes up with an improved plan to take down the Money Train, and the Strike Team is all in. Unfortunately, a federal criminal comes back to Farmington, and the Team has to use every connection and resource to bring him in before Lanie submits her final report. Meanwhile, Dutch and Claudette investigate the rape of a young girl, and an old friend from the past reappears to make Julien's life hell.

When a gang execution hits close to home for Claudette, Vic, Tavon, and Dutch work together to find the culprit before anyone else gets hurt. Shane, Lem, and Ronnie are forced to choose between hitting the money train without Vic or letting it go. As Aceveda prepares for the city council election, Danny receives some life-changing news, and the harassment inflicted upon Julien reaches a whole new level.

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.

Aceveda finds himself in a near fatal confrontation, and enlists Vic to help him take down the suspects in order to help service his own personal agenda. Meanwhile after losing her position of power, Claudette rejoins Dutch on the search for the cuddler rapist as they get a stunning break in the case.