Harry Bosch has been promoted from the LAPD Open Unsolved Unit to the Homicide Special Unit, but this supposedly greener pasture hasn`t brought better sleep. His very first case at his new job involves the murder of a doctor with access to radioactive cesium. The investigation moves to red-alert status when it`s discovered that a large quantity of the deadly material disappeared shortly before the killing. With the threat of an imminent terrorist attack hovering in his head, Bosch must not only track down the killers but also sidestep homeland security turf wars in the process. Thrilling with the deep tinge of reality.