The story takes place in the future. Intelligent people occupy most of the earth's territories by virtue of their genetic advantages. Ordinary people live in abandoned industrial cities on the ground, while the aerial cities managed by intelligent people have an excellent environment.
Wuyu grew up as an orphan in an orphanage in the city on the ground. He idolized Little A, a talented sports boy from the city in the sky and a descendant of intelligent humans.
One day, he was hired by the intelligent man Little A, and the sudden attention and changes changed Wuyu.
After getting along day by day, Xiao A's feelings for Wu Yu changed.
One has a humble status, looks fragile but is full of resilience; the other is proud and sunny, accustomed to living a life that is sought after by everyone.
An ordinary person's life is like a piece of grass; a smart person's life is high.
When the secrets of intelligent people are revealed, contrary to the entire human race, war comes again...