There's a violent storm in cyberspace, and Lissie has to stay in the Cyber Mall. Then, suddenly, everything's in confusion. The evil Data Eater is after Lissie, and Twipsy has to step in. The storm has a bad effect even in the real world: it's Technology Week in school, so the children's marks are being sent out by e-mail - and they get mixed up because of that wretched cyberspace storm ...