At the end of human civilization, the last human girl traveled back in time to 4.6 Billion years ago. Starting from a cell, witness each civilization from creation to prosperity, and finally facing decline.
The girl's name is Ish
The name Ish is not very special, but because it is a girl's name, it is the honorific name for gods in various civilizations.
They call it "Aesop"
Across the long river of time, the girl finally came to the era before God was born.
That is, the "Human Era" 4.6 Billion years from now
Purpose: inheritance of civilization