In the future (according to Capcom), just about every electronic device is connected to the Internet for speed and convenience. Everyone also carries around a Personal Terminal, or PET for short, which is like a mobile phone that lets you check e-mail, read the news, and ‘jack in' to electronic devices connected to the Internet. Each PET also as a ‘Net Navi' who acts like a personable, almost human-like guide for the PET user. Net crime runs rampant in this future world, so some people outfit their Net Navis with Battle Chips to fight viruses in the Internet world. Our heroes, 6th Grader Lan and his Net Navi Mega Man have saved the world three times already, and they'll be called to do it again in the latest title in the Mega Man Battle Network series.