It is 2025, fifteen years after the events in Net Force, the first in the Net Force series. A branch of the FBI dedicated to investigating computer crime, Net Force has established a "young people's auxiliary, the Net Force Explorers." These are high schoolers who participate in training programs designed by Net Force. In addition to honing their computer skills, they receive training in self-defense. In Virtual Vandals, members of the Net Force Explorers must use all that they have learned plus think quickly in order not only to thwart vandals who are trashing web sites and injuring people in virtual reality, but to stop a potential massacre of diplomats and their families. In Virtual Vandals, the virtual reality of the web comes of age, and a new, deadly threat emerges from it.