LAPD homicide detective Harry Bosch is back on the job after a suspension. When a dead body found in the trunk of a car on Mulholland Drive appears to have mob connections, Bosch takes on a case that could prove his biggest challenge yet. George Irving has a new assignment. Deputy Chief Irving weighs his options.

Bosch discovers that his murder case has wider implications. Deputy Chief Irving tries to stay above the political fray. Danger escalates with George Irving's plainclothes position. Harry receives a tip relating to his mother's murder. The Tony Allen investigation sends Bosch to Sin City.

Bosch and Edgar are now hot on Joey Marks's trail. George Irving is pulled deeper into his mission. And Bosch must go to extremes to ensure the safety of those closest to him.

Bosch focuses on taking down a criminal mastermind. Eleanor delivers for the FBI. Opposing forces with violent intentions all converge on the same spot.