Harry Bosch has been given three years before he must retire from the LAPD, and he wants cases more fiercely than ever. In one morning, he gets two.<br><br>DNA from a 1989 rape and murder matches a 29-year-old convicted rapist. Was he an eight-year-old killer or has something gone terribly wrong in the new Regional Crime Lab? The latter possibility could compromise all of the lab's DNA cases currently in court.<br><br>Then Bosch and his partner are called to a death scene fraught with internal politics. Councilman Irvin Irving's son jumped or was pushed from a window at the Chateau Marmont. Irving, Bosch's longtime nemesis, has demanded that Harry handle the investigation.<br><br>Relentlessly pursuing both cases, Bosch makes two chilling discoveries: a killer operating unknown in the city for as many as three decades, and a political conspiracy that goes back into the dark history of the police department.