LAPD detective Harry Bosch simultaneously investigates a killer who has been operating undetected for thirty years and a political conspiracy that has its origins in his police department.

After 24 years in prison, convicted killer Jason Jessup has been exonerated by new DNA evidence. Longtime defense attorney Mickey Haller is convinced Jessup is guilty, and he takes the case on the condition that he gets to choose his investigator, LAPD Detective Harry Bosch. Together, Bosch and Haller set off on a case fraught with political and personal danger. Opposing them is Jessup, now out on bail, a defense attorney who excels at manipulating...

Mickey Haller, changing from defense attorney to prosecutor for this one important case, joins forces with Detective Harry Bosch when a child murderer is released on bail due to DNA evidence and needs to be retried, pitting Haller and Bosch against a slick defense attorney.

Harry Bosch investigates after a bullet from a recent killing is a match for one used in the unsolved murder of a photographer in 1992.