Light years away after the destruction of the earth, there is a continuation of mankind. They are called "human seeds" by the dead people.
The mad scientist built an underground human base and created a new species. His cruelty did not realize that it would bring a devastating blow to mankind.
Gu Yan is a person who has lived among the beasts for more than ten years. It is the first time he sets foot in human territory and is adopted by others.
The people on the tower noticed his unusualness, and was hired as secretary by the third-generation tower owner's right-hand general, Christian Peter.
"Eh? Why does this contract look like... A contract of sale?"
Intention: future