For Maverick LAPD homicide detective Harry Bosch, the body in the drainpipe at Mulholland Dam is more than another anonymous statistic. Billy Meadows was a fellow "tunnel rat" who served with Bosch in Vietnam twenty years earlier. Now Bosch vows to find Meadows's killer. From a dangerous maze of blind alleys to a daring criminal heist beneath the city, Bosch's survival instincts will once again be tested to their limit. Pitted against enemies inside his own department and forced to make the agonizing choice between justice and vengeance, Bosch goes on the hunt for a killer whose true face will shock him.