After a shootout in a tow yard leaves three people dead, Major Crimes must scramble to find a disturbed man with a bag full of guns and a long list of grievances before he kills again. Meanwhile, Rusty pushes against LAPD policy in an attempt to find more evidence related to the murder of Buzz's father and uncle.
In attempting to clear up lose ends from their investigation of a gang of White Supremacists, Major Crimes detectives audit the trial of serial killer Dwight Darnell, and end up facing their most deadly case ever while Rusty’s psychologist, Dr. Joe, faces an unexpected confrontation that leaves his life in jeopardy.
When Captain Sharon Raydor and the Major Crimes Division investigate the murder of a young woman found in the LA River, their case is not only impeded by a secretive PI working for a tech industry millionaire, but also by Deputy Chief Winnie Davis, who regards Sharon as competition for the promotion to Assistant Chief of the LAPD.
When a well-known attorney, celebrated for her defense of oppressed women is found dead, there are no shortage of high-profile suspects, including her son, her ex-husband, a film director whose career she helped destroy and a former football player whose sports bars/restaurant chain, Tackles, features scantily clad women. Meanwhile, Rusty and Gus confront issues in their relationship.