In the near future, technology has made significant leaps, making videophones and constant wireless internet access available to everyone. However, it appears that the government has been careless, allowing a skilled hacker to break into the national information archive. Using the data held there, he creates the Platonic Chain website for people to discover information about themselves and their friends. Word spreads quickly that there is a site enabling you to look up anything. Coincidentally, three young girls, Hitomi, Rika, and Kanae, are able to access the site.