Lin You, a gaming prodigy, dies unexpectedly and transmigrates into a modern world secretly permeated by the rules of the underworld. He is bound to the Supernatural Judge System, which tells him his death was a trap carefully devised by his "ungrateful" brother. As a result, he becomes the underworld's newest supernatural judge in the human world, tasked with passing judgment on malicious people who evade earthly law and exploit loopholes in the rules to commit evil.
Lin You discovers that this world only seems normal. In reality, it's filled with wronged spirits and criminals whose destinies have been rewritten in the Book of Fate. He must use his unmatched gaming instincts to solve one bizarre supernatural case after another, collect fragments of fate, and fight the unseen hand rewriting people's destinies. His former brother, once deeply indebted to him but who pushed him into the abyss to seize the family fortune, has now become a terrifying enemy after merging with the power of underworld fugitives. He is trying to take control of the entire system of fate. Lin You has no choice but to wield intelligence as his blade and strategy as his shield, fighting his way to justice in this cerebral contest spanning both worlds, for himself and for the countless lives whose destinies have been altered.
