Where a gigantic explosion is space sends two strange meteors crashing to earth, a desperate call for help goes out. Mega Man speeds to the site and arrives just in time to see his arch-rival, Dr. Wily, fleein the scene... Now Mega Man must uncover the secret of the mysterious meteors in a race to stay one step ahead of Dr. Wily and his deadly breed of super-powered robots.

The Blue Bomber returns! The evil Dr. Wily discovers the remains of a strange robot that evidently came from space, and discovers a source of unbelieveablely powerful energy that could allow him to control the world with an army of unstoppable Robot Masters!

It's up to Mega Man to stop Wily once again! Now joined by a new ally, Duo, Mega Man takes off on his greatest mission yet!