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, but as her investigation progresses, Brenda's doubts about the Colonel's motives grow. With Fritz' assistance, she realizes the Colonel is not there to help, but to help his son escape. The two face off in the dark on a Los Angeles rooftop, leading to an unexpected outcome. Elsewhere in the story, Sanchez' prior service with the Rampart Division CRASH gang squad allows him to play a pivotal role in the investigation as he briefs the squad on gang activity in the area, goes undercover as a gang member and assists with interrogations. Brenda's tense relationship with Taylor seems to relax, then abruptly grows tenser when a stake-out goes wrong. Gabriel becomes increasingly loyal to her, but Flynn and Provenza continue to resist her methods, dubbing her "Miss Scarlett."

Three wealthy, spoiled and unruly children become the target of Brenda's investigation when their stepmother is murdered and the family butler seemingly commits suicide shortly thereafter. Riding heard on the trio is their family attorney, who cleans up their messes and provides them with alibis. Convinced the butler was actually murdered, Brenda sets out to discover which of the children committed the murders, and finds the real killer was someone altogether different!

An unnamed source files a grievance against Brenda in the midst of a high-profile investigation of a murdered L.A. filmmaker. With her career on the line, Brenda is skeptical of Chief Pope's intentions when he volunteers to help. In classic Brenda style, she spurns the accusation, refusing to suppress her demeanor in deference to the complaint. In response to the situation, the PHD team comes together to act in unison, sending shock waves through the entire department.

Brenda and the PHD investigate a high-profile case when a woman is brutally murdered at L.A.'s trendiest restaurant. On the home front, Brenda tries to keep a low profile as she closes in on her 40th birthday.

Brenda finds herself involved in a cover-up of her own when she helps the PHD investigate a non-priority case. Why? Because the deceased woman was found in Provenza's garage. Once again, the team finds themselves racing against the clock before the LAPD brass discovers what they're up to. Will Brenda be able to protect her team and their hard-earned trust?

Brenda and the team find themselves wading through a long list of suspects when a celebrity photographer takes a fatal fall from his hotel room balcony. Once the cause of death is determined, the motive points to a big time actor with something to hide. In the meantime, Brenda starts to feel like Fritz is behaving strangely, making her realize that superstars may not be the only ones who have secrets to keep.

Brenda and Fritz have a hard time agreeing who is in charge when an informant's wife and and FBI agent are both murdered. Brenda discovers that she and the PHD must work quickly when the leading witness in the case is scheduled to testify against a powerful mobster. When the killer's identity is uncovered, the PHD finds themselves under attack; an attack that takes someone down.

Returning to L.A. proves to be a challenge when Brenda's witness remains hesitant, causing her to be creative. The fallout left behind in Atlanta leaves Brenda's parents picking up the pieces while Fritz becomes buried underneath all the stress.

Det. Julio Sanchez' little brother Oscar is shot and killed, leaving Julio beside himself with grief and seeking his killer any way he can, which threatens the investigation.

Brenda and the squad investigate the murder of a hair stylist; Brenda's parents stop in for a visit on their way to Alaska; Brenda's father wants to know when she and Fritz are going to tie the knot.

The newly renamed Major Crimes Division investigates the death of a teenager that may be related to a planned massacre; the squad searches for a bomb before it can explode.

The body of a man who stole $3 million in diamonds is found in the trunk of a car; the condition of the body makes determining the cause of death impossible.

Brenda and Fritz's attention is diverted by problems on the job even though their wedding day has finally arrived, and bad blood between the members of the Priority Homicide Division threatens to cause one of the officers to leave the department.