The country is Equestria, and the year is 21xx. Reploids, robots that are designed to act just like ponies, are mainstream workers now. These technological advances are thanks to archaeologist Cain, who after unearthing the last creation of the late Canterlot Princess, Twilight Sparkle, decided to expand upon this idea and revolutionize the world.

But this isn't the story of X. This is the story of how Cain's first and greatest creation became the worlds biggest threat. This is the story of Lambda, a reploid made in the image of the late sun Princess, and how she soon became an enemy to all of Equestria.

Crossover with Mega Man X.