A Gyilkossági csoport néhány tagja kínzásnak vetett alá egy gyerekrablónak tartott, de ártatlannak bizonyuló férfit. Miután a rendőrség elleni eljárás vezéralakját, Howard Elias ügyvédet az Angyaljárat nevű villamoson meggyilkolták, Harry Boscht bízzák meg egy Különleges Akciócsoport vezetésével. A feladata, hogy nyomozza ki, van-e köze a Fekete Őrnek nevezett rendőrségi csoportnak a jogász meggyilkolásához.

Az akciócsoport Harris nyomába ered, miközben Bosch megvívja a maga harcát a jog berkeiben. Edgar ismét munkába áll. Eleanor sajátos helyzetbe keveredik egy titkos kártyapartin…

As the Task Force tries to clear the growing number of suspects, they discover a potentially explosive false alibi. Det. Santiago Robertson must put his personal relationships aside for the sake of the case. Edgar struggles rebalancing work and family. Bosch has an unlikely late night visitor.

Det. Francis Sheehan comes clean to Bosch, Robertson suspects a leak in the investigation, and Edgar joins the Task Force. Social unrest surrounding the Elias murder grows and Irving is pressured to intervene. Eleanor asks Bosch for parenting advice and confesses the truth about her marriage to Reggie Woo.

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.

Two off-duty patrol officers cause Billets more trouble than she needs while the protests heat up outside Hollywood Station. With a suspect in custody, the Task Force begins to wrap up the case, but Bosch remains unconvinced. Irving learns he's being played and Honey Chandler makes a surprising discovery.

Hollywood Station goes on TAC Alert. Irving plots his next moves. With new evidence, the Elias case takes an unexpected turn. Maddie tries to connect with her past. Bosch harbors doubts about his Task Force and interviews a new suspect.

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.

Bosch and Sgt. Amy Snyder uncover a key piece of evidence that could compromise the entire Elias investigation. Edgar and Robertson are rocked by personal disappointment. Irving exposes his enemies. Bosch stalks the suspected Elias killer on his own, and comes face to face with his past.