It's the year 200X and everyone in Den Tech City is plugged into the Net. But living in cyberspace isn't always fun and games. High-tech crimes and pesky viruses are always a big problem for the authorities. Thank gookness for MegaMan and his NetOperator, Lan Hikari. Together, they do their best to keep their hometown safe from being permanently deleted.
A new force has been unleashed from the darkest, wildest realms of the Net--a menace more dangerous than anything DenTech City has ever faced. What is it? MegaMan himself! Transformed by the mysterious "Beast" program, MegaMan has developed the unwelcome power to turn into a rampaging monster. While Lan's scientist dad searches for a solution, MegaMan and Lan try to deal with MegaMan's beastly new condition...while fighting the world's most powerful NetNavis!