Harry Bosch has been haunted by an unsolved case of a young girls disappearance eleven years ago. Now it seems to be the killer has been caught, connected to a string of nine other murders. It also seems as if Harry and his partner missed some crucial evidence that could have solved the case and possibly prevented the murders that followed. When the killer escapes, Harry continues to beat himself up thinking this mad man can and will kill more, but are his instincts right, will he slip-up again.....things just arent adding up until Harry discovers he is dealing with an even bigger situation than he realizes