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.

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.

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.

Nearly a year has passed and Bosch is still investigating the Daisy Clayton murder case. Meanwhile Edgar runs a sting on his dirty cops and Irvin Irving jumpstarts his mayoral campaign.

A detail from Kent's widow Alicia leads Bosch and the FBI to suspect a group of Sovereign citizens in connection to the stolen radioactive cesium and Overlook murder, but they clash over tactics, causing a deadly standoff.

When cops discover the body of a homeless man covered in radiation burns, the hunt for the cesium intensifies but Bosch and Edgar wonder if their assumptions about the crime have been wrong all along.

Bosch dives deeper into Daisy Clayton's troubled past. Edgar scrambles to find evidence confirming Bosch's suspicions in the Kent case. Hovan goes undercover to learn more about Avril's criminal dealings. Crate and Barrel return to the Homicide table, but their celebration is overshadowed by bad news.

Chandler brokers a plea deal that leads to a confession, giving Bosch and Edgar all they need to go after Kent's killer. Bosch digs deeper into a street hustle involving Daisy, but there is trouble. Irving pitches a new task force aimed at combatting homelessness, and Billets puts Vega and Pierce in an awkward position.

Working to close the murder of the Federal informant, Bosch and Edgar reveal an explosive new clue. Dwight pressures Edgar to do more to bring his son's killer to justice. Barrel receives a politically damaging old recording. Billets adds a familiar face to her new task force, while Pierce makes a report to Captain Cooper that causes friction.

Judge Sobel hears Chandler's objections to the evidence against Mrs. Kent. Irving's new task force has a win. Hovan and Edgar close in on Avril. Billets gets a call from IA and Bosch uncovers a chilling connection in the Daisy Clayton case

Bosch closes in on the Daisy Clayton murder as Elizabeth falters. Avril is cunning and tries to slip away. Killoran blackmails Irving. IA investigates Billets. In Bosch's grip, Daisy's killer makes a shocking confession.

Irving and Maddie make big decisions about their futures. Bosch and Edgar, having weathered unexpected tragedies, share bitter frustration with a system that has seemingly failed them. But with the motion hearing on the Kent murder case evidence at hand, they're each faced with a choice: to let thing go, or to take matters into their own hands.

New Year's Eve 2019. While Los Angeles celebrates, a fire breaks out in an East Hollywood apartment building killing several residents including a ten-year-old girl. When it’s determined to be arson, Detective Harry Bosch arrives on the scene but his partner, Detective Jerry Edgar, is noticeably absent.

Bosch and Edgar track down La Mayorista, but Bosch asks Vega to assist after Edgar makes a costly error. Chandler and Maddie record Franzen’s statement for the SEC before Chandler stashes him away in a safehouse. Irving and Lopez discuss the arson case, each concealing their true agendas.

Bosch is pulled away from the arson case to a double homicide in the Hollywood Hills and finds RHD Detective Jimmy Robertson on the scene. When the harassment of Lt. Billets escalates, Captain Cooper and Lt. Thorne are angry that she reported it to IA instead of talking to them. Maddie makes a shocking discovery. Bosch and Edgar try to get Alvarez to talk.

After discovering Alvarez has been transferred, Bosch enlists Chief Irving’s help. Pierce and Vega get a lead on the hitman. Billets reaches out to a former Hollywood cop for intel on Leonard and Norris. When Bosch and Edgar meet with Carl Rogers, Edgar lets a detail of the case slip, enraging Bosch.

After Maddie's involvement with the Franzen case leaves her exposed, she must testify before a grand jury to stay safe. Irving asks FBI SAC Brenner for help with Alvarez, learning something useful about Peña. The little tamale girl’s father pays Bosch a visit; his pain strengthens Bosch’s resolve to bring her killers to justice. Leonard and Norris push Billets to the brink.

Robertson and Bennett follow the hitman's trail to Las Vegas, hoping to find a connection to Fowkkes' other clients. When Billets performs a security evaluation at a local jewelry shop, she gets more than she bargained for. Irving gives Bosch an order, causing Bosch to lose faith in the system he has defended his entire career.