A boy lives in a floating town, where the poor scrape by and the rich live a sumptuous life, simply casting their garbage off the side, into the abyss. When he’s falsely accused of murder, though, his wrongful conviction leads to an unimaginable punishment: exile off the edge, with the rest of the trash. Down on the surface, the cast-off waste of humanity has bred vicious monsters, and to travel the path to vengeance against those who cast him into Hell, a boy will have to become a warrior…