Brenda and the Priority Homicide Team investigate a sniper who is killing gang members in and around MacArthur Park. Offering assistance is an ex-Army colonel who believes the sniper to be his son. As an all-out gang war looms, Brenda tentatively accepts his assistance.

The murder of an adolescent girl from Mexico, found dead in the Los Angeles River, proves difficult and painful for Brenda and her team. At first, a known sex-offender seems the likely candidate, but questions arise about why the girl and her mother were brought to the US, leading the investigation in another direction.

Brenda and her team must find not only a killer, but also identify the killer's victim when a deranged, homicidal madman is set free due to mistaken identity. While trying to make sense of an array of complexities in this unusual matter, the case takes an even darker turn when Brenda becomes the center of the psychopathic killer's attention.

When a juror in the trial of an infamous mobster is found dead, Brenda and the Priority Homicide Division find that their involvement in solving the case may be affecting the jury's final decision. Complicating her personal life, Brenda faces another new challenge: a surprise visit from her mother.

When a few body parts of an adult film star are found in a dumpster, Brenda and the team must scramble for more pieces to solve this puzzle. Once they begin putting things together, the suspect list seems to get longer. Adding more questions to her life, Brenda also finds herself making a potentially life-altering discovery.

Once again, the PHD finds themselves wading through suspects in the murder of the star witness in a capital punishment case. Meanwhile, Pope's angry ex-wife, spills the beans about Brenda to her team and Fritz begins to wonder how she really feels.