A few months after Dr. Wily's defeat in Mega Man II, several bad news were reported in Dr. Light's Laboratory from around the world, including abnormal weather, transportation failures, and industrial abnormalities. Apparently, the functions of the super computer managing people's everyday life around the world has malfunctioned, and an army of robots began rampaging, causing panic in the city. Dr. Light deduces that Dr. Wily must be running powerful jamming waves to interfere with the super computer and is behind the army of robots, and asks Mega Man to stop the robots.
