Life in the world evolved on the bodies of two giant motionless world-gods named Bionis and Mechonis. In this world, Shulk, a young man with mysterious origins, comes across a magical sword named Monado, that allows him to see glimpses of the future. Shulk finds himself caught in the struggle between the humans from Bionis and the machines from Mechonis. Along his quest to defeat the machines he will have to help the inhabitants of Bionis rebuild their world.