Twelve thousand years ago, ancient civilization was destroyed by genetic war, leaving only countless alien beasts wandering in the wild land.
Chen Yin, a doctor of modern biology, accidentally traveled through time and came to this world of The Classic of Mountains and Seas.
Relying on the golden finger of "drawing inferences from one instance to other cases", he started from surviving in the wilderness, step by step uncovered the scientific and technological truth behind the myth, and finally traveled across the mountains and seas to compile that strange book that has been passed down forever.