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 Marc gets great news about his career, April struggles with how to tell him she's pregnant; Karen meets Adam's parents; Lydia's situation has devastating consequences for Karen; Kate finds out the truth about what happened with Scott.
Facts don't add up when a man is found dead and handcuffed to a bed in a home. Also, everyone makes a farewell video as a 'bon voyage' party fast approaches in the series finale.