Six months ago, Harry Bosch left the LAPD and although Harry hates to admit it, being out of the game has its benefits. Until Mickey Haller, defence attorney, asks him to help him on one of his cases, and suddenly Harry is back where he belongs, right in the centre of a particularly brutal murder. This time, Harry is working for the defence, aiming to prevent the accused from being convicted and now, Harry is in danger of betraying the very principles he's lived by his whole career...