50 years ago, the Earth went to hell, and natural disasters nearly destroyed all of human civilization. 25 years ago, humans made a place for all of them to live. The Nine rings, the rich on the first and the poor on the ninth, and the ninth ring is where Zane Neid lived with his mother. Despite living in a poor dump, they lived honestly and happily until one day everything changed, although whether it was for the better or worse is hard to decide.