Harry Bosch finds out one of his old cases is up for review and worries that all the cases since might be questioned. In another part of town, thugs in masks murder a pharmacist.

Detective Harry Bosch swings by the DA's office under the pretense of seeing Maddie. He encounters CIU Investigator Christina Henry who is spearheading the Borders petition based on a deathbed confession from another convict, Lucas Olmer. Bosch tells Edgar about Henry and wonders if the DA would really hang a case solely on another convict's word. If Borders goes free, all of Bosch's convictions will be questioned. Back at the station, Bosch and Edgar get a lead on the Esquivel murder: suspicious prescriptions written by a Dr. Garcia. Det. Pierce tells Bosch that the killers fled to a parking garage where they may have jacked a new ride. Pierce investigates a missing person report that fits their timeline while Bosch and Edgar head to Esquivel's house to look for Jose Jr. At the same time, Det. Robertson catches a homicide and finds a stripped car in Newton. Could the two crimes be linked? Bosch talks to Chief Irving about Borders. Irving led the task force in 1996 and Bosch found the key piece of evidence in the killer's apartment - a pendant Skyler wore. Irving promises he has Bosch's back. When Irving follows up with the DA about the body cam footage, he asks about Borders. She says they have new DNA evidence and if it matches Olmer, they'll support the petition for release. Maddie defends her father's case against Borders to Galligan, and he upsets her by suggesting that Bosch manipulated evidence to make the conviction stick. Later he apologizes, and they head to a bar to get better acquainted. Edgar meets his CI, Gary Wise, while Bosch meets with Chandler and her investigator Hector Bonner. Chandler insists Bosch let Bonner handle things, so Bosch and Edgar stake out the Garcia Pain Clinic. A white van pulls up and a dozen addicts get in. Bosch and Edgar follow the van on a pill run. Desperate to flee, Jose Jr. asks his cousin Oscar for money, a car, and a gun. Irving informs Bosch that the DNA matches Olmer. Borders might go free.

Robertson finds a lead on two suspects in the pharmacy shooting. J. Edgar tries to get some background on Gary Wise who was obviously in deep trouble. Crate and Barrel are unhappy with their new assignment. Pierce and Vega get information on the whereabouts of José Jr. Bosch looks into the old Borders case and finds several hints that the Olmer confession was bogus. Going undercover, he manages to get in a support group in a VA hospital and subsequently befriends a fellow veteran who can bring him in touch with the Garcia clinic.

Louis Degner brings Bosch (as Dominic Reilly) to the Garcia Pain Clinic, where Bosch is surprised to be examined by none other than Dr. Hansen from the VA. Hansen sees Reilly as nothing more than a pathetic addict. He gives Bosch a few pills and sends him home, saying they'll be in touch when it's time for Bosch to repay the favor. Seeking answers to his CI's killing, Edgar follows up with Gary's old gang contacts - men who spent time in jail after Gary flipped on them following a robbery 20 years ago. Robertson and his team search a warehouse where they find the pharmacy killers' getaway car and a link to the shell company that owns the shill plane - Western Sandblast. Hoping to rattle someone into making a mistake, Bosch visits Borders in prison while Bonner confronts Rita on the outside. Borders' cocky demeanor changes when Bosch lets him know they've been talking to his wife. Maddie, finding herself emotionally drawn into a rape victim's trial, considers the intricacies of justice, as Barrel considers Billets' suggestion that it's time to retire. Bosch updates Chief Irving on the Borders case. Bosch believes Olmer's attorney, Lance Cronyn, stealthily obtained Olmer's DNA during one of his many visits. After Irving provides Bosch with video from the LAPD property room where a key piece of evidence was handled, Honey Chandler and Bosch figure out how Olmer's DNA was then planted by a property clerk named Spencer. While weighing an opportunity to run for Mayor, Irving provides DA Hines with a potential alternative bringing criminal charges in the officer-involved shooting. CIU Investigator Henry searches for evidence to back her belief that Bosch planted the seahorse pendant to frame Borders -- just as Irving shreds a document involving the very same evidence.

Bosch and Chandler track down Spencer, and try to persuade him to turn on the Cronyns in order to save himself. DEA Agent Hovan interviews Hart, who teases some additional useful information about the real mastermind behind the killings. Pierce and Vega catch a gruesome new homicide. Christina Henry continues her pursuit to have the DA look into possible criminal misconduct by Detective Harry Bosch. Crate plans Barrel's retirement party. Edgar finally tracks down Bo Jonas, who provides new clues about Gary's murder. At Hollywood Station, Captain Cooper convenes Lieutenants Billets and Thorne, wanting to confirm everyone's on the same page regarding the doctored crime stats. Chandler asks Bosch what Henry has against him, believing she can exploit Henry's personal animus at the upcoming hearing. The hearing begins. To the surprise of DDA Kennedy and the dismay of the Cronyns, Chandler is able to convince Judge Sobel that Bosch has standing. Tension mounts as she presents her case, and Borders unravels and exposes the entire scheme behind the case. Maddie tells Bosch she's decided to go back to school early. She reveals that what she really needs is some space - from him.