The Devil's Manual is the legendary key that opens the door to darkness. When the Holy Flame Emperor obtained it, it was used by the devil who created it. After the failure of the first battle between ice and fire, the Holy Flame Emperor hid it in a secret compartment of the palace. After the Holy Flame Emperor was deposed, Gongsun Tianping, the former Minister of Rites, who did not know the truth, took the book and gave it to his son Gongsun Xuanhua as a ghost story book. Gongsun Xuanhua, on the other hand, had to face the pressure from the two Holy Sees, the Nine Holy Flame Kings, and all other secular and religious rights. Watchers gradually begin to appear in the world, and the attitude of the Council of Mages towards this book of demons seems extremely ambiguous. Amidst all the contradictions, can Xuanhua avoid being exploited by the power of demons, and get rid of the pressure and entanglements from the world? Can this rich and suffering continent once again withstand the ambition of the devil?