In his first case since he left the LAPD's Open Unsolved Unit for the prestigious Homicide Special squad, Harry Bosch is called out to investigate a murder that may have chilling consequences for national security. A doctor with access to a dangerous radioactive substance is found murdered on the overlook above the Mulholland Dam. Retracing his steps, Harry learns that a large quantity of radioactive cesium was stolen shortly before the doctor's death. With the cesium in unknown hands, Harry fea