A few months later, when the body of Lianne, a 17-year-old homeless girl, is discovered on the bank of the canal where Doll likes to fish, it's obvious to the police - and especially DI Furth - that Doll is responsible: Kit is called in again to help fit him up for the crime. But, as a girl with high moral principles, she refuses to do so, destroys their case, and solves the crime - and several others - herself, relying not on her skills as a psychologist, but on her ability to find evidence the police have missed, to re-interpret that which they have found, and to suggest new lines of investigation when they are baffled.