The ugly truth behind his mother's murder has left LAPD homicide detective, Harry Bosch, as tense and restless as ever. A homeless veteran is murdered. Bosch works a high-profile trial involving a Hollywood director. The Veronica Allen proceeding nears resolution. Bosch keeps tabs on a longtime criminal who's eluded justice.

A suspected killer whom Bosch has pursued for several years turns up dead in an apparent suicide. Edgar discovers that Harry has a complicated history with the dead man. When the case is later ruled a homicide, Detective Jimmy Robertson develops troubling theories about the culprit.

Bosch operates behind-the-scenes to expose wrongdoers. Killers are in the wind. Edgar deals with the fallout of a crucial choice.

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.

Bosch investigates new evidence that may overturn Borders' conviction, but he remains convinced they locked up the right man. Lieutenant Billets is forced to deal with Crate and Barrel's role in the accident at the pharmacy crime scene.

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.

Spooked by her encounters with Bonner, Rita visits her husband Preston Borders in jail. Borders believes Bosch is behind Bonner's visits, and tells her to have Cronyn deal with it. Bosch and Chandler try to figure out how property clerk Terry Spencer is involved with the Cronyns. On a hunch, Bosch calls Cronyn's office posing as Spencer. Cronyn demands to know why Spencer is calling him. "I'm not your contact." Later, Bonner watches Rita meet with Cronyn's wife, Kathy Zelden. The circle of conspirators appears complete. While Christina Henry looks through the same case files that Irving recently tampered with, her friend Lt. Torres probes her more personal reasons for targeting Bosch. Crate and Barrel discover someone is manipulating the city's crime stats. They bring the worrying news to Lt. Billets. Pierce and Vega can't find Jose Jr. While searching a warehouse the pharmacy killers may have used, one of Robertson's team members nearly dies from exposure to traces of Fentanyl. At city archives, Bosch looks at the Skyler case search warrants and realizes the before-search photo from Borders' bedroom is missing. He remembers that Irving entered the apartment with a photo team before Bosch discovered the seahorse pendant. After Bosch learns both Henry and Sgt. Wash also have been in the files, he asks Irving about the missing photo. The Chief stonewalls him. Bosch arrives undercover at the Garcia Clinic, and goes on a pill run. Edgar and a second detective follow the van, but they have to back off once their cover is blown. Instead of returning to the Clinic, the van heads to Whiteman Airport. Edgar arrives just in time to see the twin otter climb into the sky, his partner on board.