Bai Xuan, an ordinary librarian, leads a boring life day after day.
One day, when he was organizing the bookshelf, he accidentally came across a wordless heavenly book and was drawn into a mysterious space called "Blank".
Here, he was told that he had been selected to become a "patchman" and needed to enter each incomplete world, repair bugs, and maintain the order of the world.
Concept: see the essence through phenomena