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.

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.

Stuck now at the desert shill encampment with no easy escape plan and no way to communicate with Edgar, Bosch befriends Clayton and searches of information about his murder suspects. He learns about the death of her daughter, Daisy. Maddie, still raw from losing her mom and fearing the worst, asks Billets about where her dad may be. That Bosch is still undercover is news to Billets, but she reassures Maddie that everything will be okay. Pierce and Vega, concerned that the pharmacy killers have also learned Jose Jr.'s hiding spot, head to Bakersfield to find him. They intercept one of the killers who's there to tie up the loose end that is Jose, Jr. While Cronyn assures Borders that Bosch will play no role in his upcoming hearing, Chandler lays legal groundwork with a visit to her good friend Judge Sobel. Billets and Mankiewicz realize just how far up the chain of command the manipulated crime stats might go, forcing Billets to wrestle with what she'll do with the information. On a pill run back in LA, Bosch gets Clayton arrested, hoping to use her to get a message to Edgar. On return to the compound, however, Walsh has grown weary of Bosch, and Bosch finds himself in another dangerous jam. Edgar, researching the Haitian businessman he saw with Marcos and Arias, gets a call about Clayton's arrest, and the note she carries from Bosch. Scott Anderson gets tipped about police misconduct, and Cronyn suggests Bosch planted evidence to frame Borders for murder. Anderson seeks corroboration with mixed results. But lacking only a statement from Bosch, Anderson's editor decides to run the story.

Detective Edgar questions Clayton in an effort to locate Bosch. Clayton suffers serious addiction withdrawal, but remembers some details that may prove helpful. The LA Times article about Bosch and Borders has blown Bosch's cover. Walsh sends Bosch out over the Salton Sea to be killed, but Harry turns the tables on his would-be killers. A worried Maddie reads the article about her father, and, his whereabouts unknown, fears the worst. As Billets insists they inform LAPD command and local authorities that Bosch has gone missing, the call comes in that Bosch is heading back to town. Spencer's now in the wind, but Chandler suspects he's someplace the Cronyns control. DDA Kennedy accuses Christina Henry of being Anderson's source for his Borders expose. Though she denies it, he cautions her not to let her personal feelings about Bosch cloud her judgment. Chandler and Bosch uncover more details about how evidence was manipulated in the Borders case. Pierce and Vega nail Hart in the pharmacy murders. Irving tries to persuade the DA not to pursue the officer-involved shooting. He promises to deal with it internally, and her fair treatment of the cops could go a long way toward securing her political future. Then the Chief makes a rare appearance at Hollywood Station - seeking the truth about Bosch's undercover adventures in the desert. Edgar realizes a key witness to Gary Wise's murder is hiding in plain sight.

Pierce and Vega find more body parts, and tie their murder to an ongoing RHD case. Maddie tells Bosch she sent the memo to Chandler, and doesn't regret it. Edgar knows who killed Gary Wise, but can't prove it.