In 'The Black Echo,' LAPD homicide detective Harry Bosch is summoned to a routine drug overdose scene that quickly proves to be anything but ordinary. Recognizing the victim as a fellow Vietnam 'tunnel rat,' Bosch is plunged into a case that is deeply personal. As he navigates through a labyrinth of dangerous alleys and a criminal heist, Bosch's resolve is tested to its limits. Battling adversaries within his own department, he faces the dilemma of choosing between justice and vengeance, while on the trail of a murderer whose identity will leave him stunned.