Renée Ballard works the night shift in Hollywood, beginning many investigations but finishing none, as each morning she turns her cases over to day shift detectives. A once up-and-coming detective, she's been given this beat as punishment after filing a sexual harassment complaint against a supervisor. But one night she catches two cases she doesn't want to part with: the brutal beating of a prostitute left for dead in a parking lot and the killing of a young woman in a nightclub shooting. Ballard is determined not to give up at dawn.

For maverick LAPD homicide detective Harry Bosch, the body in the drainpipe at Mulholland Dam is more than another anonymous statistic. This one is personal...because the murdered man was a fellow Vietnam "tunnel rat" who had fought side by side with him in a hellish underground war. Now Bosch is about to relive the horror of Nam. From a dangerous maze of blind alleys to a daring criminal heist beneath the city, his survival instincts will once again be tested to their limit.

By age twenty-four, Letty Davenport has seen more action and uncovered more secrets than many law enforcement professionals. Now a recent Stanford grad with a master’s in economics, she’s restless and bored in a desk job for U.S. Senator Colles. Letty’s ready to quit, but her skills have impressed Colles, and he offers her a carrot: feet-on-the-ground investigative work, in conjunction with the Department of Homeland Security.

Los Angeles County Sheriff’s Detective Stilwell has been "exiled" to a low-key post policing rustic Catalina Island, after department politics drove him off a homicide desk on the mainland. But while following up the usual drunk-and-disorderlies and petty thefts that come with his new territory, Detective Stilwell gets a report of a body found wrapped in plastic and weighed down at the bottom of the harbor. Crossing all lines of protocol and jurisdiction, he starts doggedly working the case.

On the night he celebrates a big win, defense attorney Mickey Haller is pulled over by police, who find the body of a former client in the trunk of his Lincoln. Haller is immediately charged with murder but can’t post the exorbitant $5 million bail. Mickey elects to represent himself and is forced to mount his defense from his jail cell in downtown Los Angeles. Even if he can obtain a not-guilty verdict, Mickey understands that it won’t be enough. In order to be truly exonerated, he must find out who really committed the murder and why. That is the law of innocence.