After the terrible Third World War, Earth became a desolate wasteland, with only a few humans left struggling to survive.
Humanity found hope again when a scientist discovered inscription technology.
With its help, human civilization quickly recovered, and even surpassed the technological achievements of the old civilization.
But nothing comes for free.
The abuse of inscription technology caused living things to mutate into monsters.
Humans also used technology to alter their own genes, becoming a new generation of humanity.