Steven Parnell, who was accused of murdering a number young girls the previous summer, is killed while in prison awaiting trial. Morse had not been involved in the case as he was on leave during most of that investigation. What piques Morse's interest is that one of the victims, Karen Anderson, was never found and it is assumed that her body was dumped in a nearby lake but Parnell confessed to his priest on his deathbed that he wasn't responsible for that particular murder. When one of the witnesses in the case, George Daly, is murdered, Morse and Lewis try to find some connection to Anderson's disappearance. They also wonder why Anderson's camera - she was an avid photographer - wasn't found. What they come across is a group of middle-aged men whose hobby is taking so-called glamour photos.
该剧改编自Michael Connelly所著系列小说第六本《无辜法则 The Law of Innocence》。Mickey Haller面临职业生涯中最棘手的案件——他与团队不懈努力，力图证明自己并非前客户Sam Scales谋杀案的凶手。为洗清冤屈，他们必须揭开Sam最后一场骗局的真相，这迫使他们与地区检察官办公室、联邦调查局以及Mickey自身过往的阴影展开正面交锋。
