She uses the anonymity of the internet to select her prey; chat rooms and intimate promises are her weapons. Her victims never even learn her real name. Kathryn Scarrow is the detective in charge and she has the unfortunate task of trying to catch a murderer that has left no trace. Kathryn and her team soon discover that whilst the Internet is very good at preserving anonymity, it does leave clues and traces if you know where to look. Can they use the web to catch a Spyder?