In the modern city, porter Lu Li accidentally triggered the ancient seal, and a glass bead melted into his right eye, awakening the 'Netherworld Eye' - which can see ghosts, identify ghosts, and break karma. He was forced to step into the gap between Yin and Yang, and took orders in the Yang world to exorcise evil spirits and save wronged souls. However, he was repeatedly counterattacked by the remaining laws of the underworld, hunted by fugitives from the underworld, and besieged by human warlocks. As his ability recovered, he discovered that his right eye was actually transformed by 'Lu Zhao', the chief judge of Hades who had been suppressed for thousands of years, and Lu Zhao was his biological father whom he had never met. The main plot revolves around cracking the truth about his father's seal, clarifying the old case of the collapse of Hades, and re-establishing the Yin-Yang contract. In the critical situation of imbalance among the three realms of humans, ghosts and gods, Lu Li must assume the responsibility of the judge in his mortal body and rebuild order in the ashes.