Renée Ballard and the LAPD’s Open-Unsolved Unit get a hot shot DNA connection between a recently arrested man and a serial rapist and murderer who went quiet 20 years ago. His father was the Pillowcase Rapist, responsible for a five-year reign of terror in the City of Angels. But when Ballard and her team move in on their suspect, they encounter a baffling web of secrets and legal hurdles. Meanwhile, Ballard’s badge, gun and ID are stolen. She works the burglary alone, but her mission draws her into unexpected danger. So she knocks on the door of Harry Bosch. At the same time, Ballard takes on a new volunteer to the cold case unit: Bosch’s daughter, Maddie, now a patrol officer. But Maddie has an ulterior motive for getting access to the city’s library of lost souls --- a case that may be the most iconic in the city’s history.