sentences:  Connelly was inspired to write the story by a friend who received an organ transplant.After receiving a heart transplant, retired FBI criminal profiler Terrell "Terry" McCaleb is contacted by Graciela Rivers, the sister of his donor Gloria, and asked to investigate her death, which occurred during an unsolved convenience store robbery.McCaleb had become a minor celebrity as the head of the FBI task force on the "Code Killer", an L.A.-based serial killer (similar to the Zodiac Killer) who always signed his notes with the code "903 472 568", but he is now living on his fishing boat and has been inactive to prevent rejection of his new heart (to the extent that he cannot even drive).