From the introduction: Welcome to Amami City, a high tech metropolis on the coast of Japan. Algon Soft has provided every household in the city with a free computer that is connected to the city's own network. Right now everyone is excited about Paradigm X being opened to beta testers. Beware, however, behind this innocent looking game lies a conspiracy orchestrated by the Phantom Society. You enter the world the same night a certain hacker hacks his way into the Paradigm X beta.