Thousands of years ago, two ancient civilizations fought a devastating cyber war — until a single rogue program ended the conflict and both cultures vanished from history. In the year 20XX, a surge in cybercrime leads the Ministry of Science to found NetPatrol, a covert internet security force combining civilian and official NetBattlers. Among those chosen are Netto, assigned to protect Akihara Town, and Enzan, assigned to the Government Complex.