Amami City is a Japanese megalopolis of the near future. In this huge city, each house has a computer, and all computers are linked to one big network. The flow of information is being controlled by the government, and software companies create huge virtual locations-networks. An eighteen-year-old member of a hacker group called Spookies and his companions gain access to one of these networks - a virtual city called Paradigm-X, created by Algon Soft. However, an accident occurs during the hacking, and a mysterious demon who calls herself Nemissa emerges. The Spookies must find the true reason behind Nemissa's arrival, and confront a shadowy organization known as Phantom Society, which employs demon summoners.