Net Force Explorers Matt Hunter and Maj Green are excited to be in Los Angeles for the annual computer gamers' convention. One of the top new designers is about to unveil his latest creation. But then the monsters from his game escape and attack Matt and Maj in virtual reality. And when the two are almost kidnapped, they realize that no one at the convention is safe. Though nobody else believes the danger is real, Matt and Maj call in the rest of the Net Force Explorers to discover who is behind the deadly rampage - and why...