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.

Bosch learns more about the dark past and murder of Billy Meadows. The credibility of a key witness threatens to undermine the Holland case. Edgar maneuvers to handle damning evidence. Dangerous men target Bosch.

The secret effort to smear Bosch intensifies. Harry and his colleagues struggle to uncover who's trying to frame him. Irving closes a chapter in his personal life, but is ensnared in departmental politics. Bosch digs into the history of former soldiers under suspicion. Killers pull off a major score.

The department rallies when a threat hits close to home. There's a pivotal turn in the Holland case. Bosch is forced to face a dark truth. Irving embraces a lifelong goal. There's no honor among thieves.

Bosch struggles to manage all the things he's lost and to keep the darkness at bay, from himself, and from Maddie. The Task Force bears down on two suspects. Acting Captain Grace Billets gets tangled in station politics and petty opposition, no longer everyone's best friend.

The search for Sheehan intensifies, as pressure mounts to solve the Elias murder. The Task Force waits for ballistics to confirm their suspicions. Edgar and Bosch pursue an unofficial 'side project' in the San Gabriel Valley. Billets and Dets. Crate and Barrel respond to a suspicious hit and run in Hollywood.

The protest looming, Billets strikes a deal with the activists. Irving realizes that old friends are new enemies. Crate and Barrel solve the case of their careers. As the Task Force scrambles to salvage their investigation, Bosch finds himself in the depths of underground Los Angeles.

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.

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.

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.

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.

Bosch learns more about the dark past and murder of Billy Meadows. The credibility of a key witness threatens to undermine the Holland case. Edgar maneuvers to handle damning evidence. Dangerous men target Bosch.

The secret effort to smear Bosch intensifies. Harry and his colleagues struggle to uncover who's trying to frame him. Irving closes a chapter in his personal life, but is ensnared in departmental politics. Bosch digs into the history of former soldiers under suspicion. Killers pull off a major score.

The department rallies when a threat hits close to home. There's a pivotal turn in the Holland case. Bosch is forced to face a dark truth. Irving embraces a lifelong goal. There's no honor among thieves.

Bosch struggles to manage all the things he's lost and to keep the darkness at bay, from himself, and from Maddie. The Task Force bears down on two suspects. Acting Captain Grace Billets gets tangled in station politics and petty opposition, no longer everyone's best friend.

The search for Sheehan intensifies, as pressure mounts to solve the Elias murder. The Task Force waits for ballistics to confirm their suspicions. Edgar and Bosch pursue an unofficial 'side project' in the San Gabriel Valley. Billets and Dets. Crate and Barrel respond to a suspicious hit and run in Hollywood.

The protest looming, Billets strikes a deal with the activists. Irving realizes that old friends are new enemies. Crate and Barrel solve the case of their careers. As the Task Force scrambles to salvage their investigation, Bosch finds himself in the depths of underground Los Angeles.

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.

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.

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.