Humanity has frozen at the end of its existence. People's lives were concentrated in leafy cities. Power is in the hands of the highest, while the rest have to survive, even while inside fortified walls. So what to do? It's even worse outside. The earth turned into a desert scorched by wars and diseases. And, believe me, a head bitten off by a predator is far from the worst thing that can happen there. Scavengers are genetic human trash. Here it is better to be dead than captured. Mirai was born in a fortified ancestral valley. But she had to leave when she was a boy. It was burned out by scavengers. A descendant of an ancient family, he is raised in a monastery as a warrior. The body grows stronger and acquires skills, but retains the heritage of its ancestors. A warrior with the soul of a righteous man. Having found a mention of a mysterious book in the diary of his deceased mentor, he sets out to find it. The path of the righteous sometimes leads through cities full of vice, and sometimes leads him into the desert. And it turns out that it contains a lot of surprises.