Bosch continues his hunt for the pharmacy killers. Edgar confronts possible suspects in Gary Wise's murder. Hoping to rattle some cages, Bosch pays a surprise visit to an old nemesis. Chief Irving considers a run for mayor.

Bonner has a breakthrough in the Borders case. Christina Henry gets closer to uncovering police misconduct. Bosch realizes not everything with the Borders investigation was as it appeared. Edgar and Bosch get more than they bargained for in a return trip to the Garcia Clinic.

Chandler and Bosch locate Spencer, and try to pressure him to flip. At Borders' habeas hearing, Chandler gains standing for Bosch and reveals the Cronyns' conspiracy. Edgar connects Marcos and Arias to a shady Haitian under CIA protection. Irving considers his future. Pierce and Vega catch a gruesome new homicide. Bosch has one remaining loose end to tie up in the Skyler murder.