Yang Fei, known as the "Walking Encyclopedia", is proficient in alchemy, swordsmanship, magic theory, ancient languages... And is the youngest tenured professor in the history of the college. However, this all-around academic giant is actually a disabled person who cannot dress or eat without his assistant. During an ancient book restoration, he accidentally triggered an "omniscient magic book" that recorded forbidden knowledge. It claimed to be able to fulfill any thirst for knowledge of the holder at an unknown price. At the same time, strange "mirror murders" began to occur in the city - the deceased were all killed by a "mirror body" that was exactly the same as themselves, but with a dark and twisted personality. When Yang Fei's research touched on the truth, his mirror image quietly appeared in the laboratory and sneered at him. What's even more frightening is that this "self" who has all his knowledge and physical abilities but no moral restraint is trying to replace him and use that magic book to impose a twisted order based on absolute "prejudice" on the entire world. Yang Fei must race against a "perfect" self in the quagmire of trivial matters in life, uncovering the ancient conspiracy behind the grimoire and mirror image, and his biggest enemy may be hidden in his every desire for "omniscientness."