Wen Yu, a cold college student who is immersed in ancient books and programming, awakens the ancient blood in his body due to an adventure in the library, and obtains a golden finger that connects to the "All Things Library". Forced into the extraordinary world of modern cities, he transforms from a bystander into a guardian. In the process of exploring his own origin and protecting the ones he loves, he will reveal the hidden truth of the world, engage in a fateful showdown with a powerful enemy, and eventually become the balancer between the mortal and extraordinary worlds.
