As Bosch digs into the Skyler case, he becomes more convinced that the Olmer confession is false. Robertson zeroes in on the identity of the pharmacy killers. Seeking a connection to the pill mill, Bosch goes undercover and befriends a fellow vet. Pierce and Vega work a lead on Jose, Jr. Edgar discovers that Gary Wise's life was more troubled than it appeared.

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.