When three young women are discovered strangled and mutilated in a Glasgow park, it is up to DCI Lorimer to find their killer. Frustrated by a lack of progress in the investigation, Lorimer is forced to enlist the services of Dr Solomon Brightman, psychologist and criminal profiler. Together they form an uneasy alliance.

But when a homeless man is brought in for questioning the investigation takes a bizarre turn. Soon Lorimer has to scratch the surface of the polished Glasgow art world and reveal the dark layers hidden beneath...