While Dutch and Claudette investigate the murder of Nancy Reborg, they discover that her daughter is missing and has been sold by her addict father to a child molester. David tries to crack corruption in the Barn by recruiting Terry to help him take down Vic.

Following the shooting death of a police department informant, Aceveda turns up the heat in the investigation of Mackey and his Strike Team.

It's warrant sweep day at the Barn. Vic and the Strike Team discover visiting NBA superstar Derrick Tripp hanging out with his "homies" before the evening game with the Lakers. Vic decides to do his part for the home team by keeping Tripp as a "friendly hostage". One of Vic's street informants, Connie, approaches him after having been roughed up by a new john. Vic hands off the case to Claudette and Dutch, who is convinced they're on the trail of a serial killer. Dutch's theories are proved wrong when he and Claudette ultimately discover that their perp is not a serial killer but rather a disturbed man who is raping women in a desperate attempt to procreate. Danny and Julien stumble upon a gun smuggling ring while delivering one of their warrants and disaster is averted only by Danny's sharp instincts. David has his hands full overseeing the sweep, managing an increasingly packed cage, soothing the frazzled nerves of the attending desk sergeant, and avoiding a potential lawsuit from Derrick Tripp's lawyer over the disappearance of his star client.

A dispute over an up-and-coming singer's success erupts in a gang war that threatens to bring Vic down, too; a case that could help Aceveda's political future sends Dutch and Claudette searching for a missing day laborer.

Mackey must recover the stolen evidence from a drug bust before Aceveda is able to pin the theft on him.

As Dutch's theory about a serial killer preying on prostitutes proves true, he convinces Aceveda to launch an all out effort to find him before he strikes again; Julien decides to bring down Vic for stealing drugs.

The murder of seven gang members has Vic be teamed with a Latino detective assigned to crack the case.

As the Strike Team is reassigned pending the investigation in the theft of evidence, Vic teams with Claudette in order to keep some deadly drugs off the street.

Lemonhead sets out to make things right following his shooting of an unarmed man.

As Dutch uncovers a lead to the serial killer, a reporter questions force Aceveda to explain problems he thought were buried far in the past.

A confrontation between a local drug dealer and Black Muslims places Vic in danger of being exposed.

As a deployment policy leads to a double homicide that places Aceveda in the hot seat with potential voters, Vic is forced to help Gilroy avoid being implicated in a hit and run.

As cop killings strike Farmington, Aceveda is caught between two corrupt cops looking to save their own skins.