In 2035, ten years after Japan began dumping nuclear wastewater into the sea, the human world is still enjoying peace and prosperity. But nuclear radiation has profoundly affected the mysterious world beneath the earth. The underground Maya are forced to break through the crust and fight for survival. The two species wage a fierce battle on Earth for their very existence. The Maya command giant beasts with special abilities, making humanity, which considers itself the master of the planet, pay a terrible price. Corpses litter the land, and civilization is destroyed. As humanity faces extinction, there are always those who rise up and fight, composing a stirring, epic saga!