Representing the system's most unsavory characters in his work as a criminal defense lawyer, jaded attorney Mickey Haller takes on his first high-paying and possibly innocent client in years, but finds the case complicated by sinister events that suggest the workings of a particularly evil perpetrator.
Thanks to a heart transplant, former FBI agent Terrell McCaleb is enjoying a quiet retirement, renovating the fishing boat he lives on in Los Angeles Harbor. But McCaleb's calm seas turn choppy when a story in the "What Happened To?" column of the LA Times brings him face-to-face with the sister of the woman whose heart now beats in his chest. From her, McCaleb learns a terrible truth: that the donor of his heart was not killed in an accident, as he'd been told, but was murdered. Wracked with guilt over the fact that he's alive because another human being was killed, McCaleb embarks on a private investigation of his donor's murder - a crime as horrific as anything he ever encountered as a serial killer investigator for the FBI.
Un hombre recibe una carta que le urge a pensar en un número, cualquiera. Cuando abre el pequeño sobre que acompaña al texto, siguiendo las instrucciones que figuran en la propia carta, se da cuenta de que el número allí escrito es exactamente en el que había pensado.