Tokyo has enacted the Youth Protection Ordinance, minors are forbidden to be out at night, and the internet is policed however, Sirrut, an underground rebel organization, has declared war on Fumito Nanahara. Sirrut uses the internet to try and find information in cyberspace, and they discover something more gruesome, TOWER, a mysterious organization behind Fumito that is rumored to be conducting experiments involving human beings, and alluding to people being...eaten.