A young man enters the culverted remains of an ancient Glasgow stream, looking for thrills. Deep below the city, it is decaying andclaustrophobic and gets more so with every step. As the ceiling lowers to no more than a couple of feet above the ground, the man finds hispath blocked by another person. Someone with his throat cut. As DSRachel Narey leads the official investigation, photographer TonyWinter follows a lead of his own, through the shadowy world ofurbexers, people who pursue a dangerous and illegal hobby, a worldthat Winter knows more about than he lets on. And it soon becomesclear that the murderer has killed before, and has no qualms aboutdoing so again.
