Gray Era Star Rain

Before the gray "zero", the earth experienced an event codenamed "Star Rain". After many organisms mutated for unknown reasons, triggering a real "annihilation". The earth entered a gray era. The rulers of the old world would eventually wake up. How could humans resist? How would the slaves of the rulers of the old world play with the collapsed world? . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.