Dr Tony Hill, head of the new National Profiling Task Force, sets his team an exercise: they are given the details of missing teenagers and asked to discover any possible links between the cases. Only one officer comes up with a theory, a theory that is ridiculed by the group? until one of their number is murdered and mutilated. For Tony Hill, the murder becomes a matter for personal revenge and, joined by colleague Carol Jordan, he embarks on a campaign...