Receiving a notebook with details about a 20-year cold case, homicide detective Harry Bosch teams up with LAPD detective Renee Ballard before uncovering disturbing clues about his late mentor.
LAPD Detective Renee Ballard, investigating a New Year’s Eve murder along with an unsolved murder, teams up Detective Harry Bosch once again when their two cases—one old and one new—intersect, while an undetected killer watches their every move.