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.

The Major Crimes unit continues to investigate the conspiracy behind Dwight Darnell’s murders and his links to the Zyklon-Brotherhood. Sharon Raydor, disturbed by her own reactions to the case, seeks penance in the Ritual of Confession.

The Major Crimes unit gets closer to the elusive mastermind behind the Dwight Darnell murders; Buzz and Rusty's investigation into the murder of Buzz's father comes to an end.