Retired Det. Harry Bosch, now a Private Investigator, is hired by aging billionaire Whitney Vance to handle a personal matter with major implications. When the man who ordered her murder a year and a half ago walks free, a devastated Honey “Money” Chandler teams Bosch to fix injustice. Maddie Bosch, still finding her footing as a rookie patrol cop, is assigned to a hard-charging Training Officer.

Bosch reaches a dangerous end game in the Vance case. Chandler courts an unlikely ally in her wrongful death suit. Maddie pays the cost of getting too involved with her work.

Bosch and Chandler secure key witnesses against Ellis and Long. Chandler enters her endgame with the Feds. With Ellis in the wind, Maddie and CRU are tasked with protecting Bosch.

Bosch clashes with RHD detective Renee Ballard as they attempt to catch the "flower girls" serial killer before another victim is claimed.