Club Purple is the place to be. What makes it so fantastic is the mysterious DJ Pardoman, who keeps his face hidden behind an ever-changing electronic mask. When a competition is announced to unmask him, everyone wants to know who's behind it. To win, entrants have to find out as much as possible about DJ Pardoman. Of course, Dinah, Lloyd, Harvey and the other SPLAT (Society for the Protection of our Lives Against Them) members want to try their hand at winning. During their research, Dinah makes a discovery on the internet-something she can't even tell the rest of SPLAT about. But when she goes off to investigate alone, she doesn't realize that she's being lured into a trap ...set by the Demon Headmaster! Can SPLAT foil his evil plans once more? Or will the Headmaster succeed in using Dinah in his mission to control the country?