A serial killer is targetting girls who work in the internet sex industry. He is tracing the home addresses of those who strip in front of their own web cameras and then killing them why they are online. Sosh takes this personally and begins her own 'cyber' investigation, against Annies instructions, and takes more and more risks while doing so. Meanwhile the rest of the team are running down leads in the real world, trying to catch the killer before he strikes again.

Annie finally gets what she really wants when Level 9 manage to catch the mysterious, and elusive, 'Crazyhorse'. Very soon though the question turns out to be whether they are the ones who have caugh ttheir nemesis or whether he is the one who has 'trapped' them, especially when Annie collapses with some unknown and seemingly undiagnosable illness. As the rest of Level 9 try to find out what she was poisoned with, and how it got into her system, Tibbs collapses with the same symptoms. Can the rest of the team find out what is going on before they to come down with this real virus or will 'Crazyhorse' end up the victor?