In this modern society, a new kind of “illness” is striking young boys and girls; Loneliness, disbelief and outrage push this generation to get more or more attached to Internet and technologies. The experts called those symptom “Net Addiction”. To prevent that, a certain Rehabilitation Facility has been set up to “Lead the young man back to the right path”. Enrolled to treat is addiction, Hibiki had no idea that this Rehabilition Facility is nothing more than a prison. In this place where it's not permitted to escape, how will Hibiki challenge despair in this hell?