Following the incident at the Research Centre things seem to be looking up for Lloyd, Harvey and Dinah. The Headmaster is finally gone and they're moving back to their old town to be reunited with the rest of SPLAT. Dinah who is still invetigating the creeper with the help of Professor Claudia Rowe meets Michael Dexter son of Professor Tim Dexter and finds out about his project on artificial intellegence, Hyperbrain. A comouter that can think like a human. It all sounds great but soon libraries are closing, news stops being broadcast and badges with green hands begin appearing everywhere. Also the new controller of the Hyperbrain project sounds very like the Headmaster, but it couldn't be... could it?
Gillian Cross delivers again on this book. SLAT are brought right up to date with the introduction of the Cybercafe and SPLATweb.