In Shanghai during the Republic of China, Chen She, a newly hired martial arts teacher at St. Mary's School, whose true identity is the "Netherworld Judge" who walks in yin and yang and specializes in punishing evildoers. In troubled times, there are loopholes in the legal network. Tyrants, profiteers, and powerful people bully others with impunity. Using the "Book of Contract" handed down from his ancestors as proof, Chen She's Nether Eyes saw through the karma of evildoers and made a "penalty agreement" that would make the evil deeds backfire on the spot - the moneylender was eaten by the money poison, the person who sold counterfeit medicine suffered from facial sores, and the son of a powerful man showed evidence of his crime in public. Female detective Qin Ruolan initially regarded him as a vigilante who trampled the law, but after witnessing privileges escaping sanctions again and again, she gradually recognized the justice of "compensating for the law with punishment." When all the crimes converged on an ancient organization that believed in the "Seven Deadly Sins", Chen She discovered that he was the real pawn in this thousand-year judgment...
