Lin Mo, a medical student, accidentally activated the "Three Realms Merit Book" system because of his bravery to save the school beauty. He originally thought that this was just a golden finger who could be rewarded for doing good deeds, but he discovered that the "good deeds" tasks issued by the system were actually to solve weird and bizarre supernatural events: appeasing the baby spirit crying late at night in the teaching building, rescuing the resentful souls possessed by the murder scene, and slaying the inner demons lurking in people's hearts... Every time he completed a task, the merit points he obtained could not only be exchanged for lost ancient medical skills and Taoism, but also allowed him to glimpse another terrifying world hidden under the modern city.
