In the modern urban setting, there is a blurred boundary between the human world and the spiritual world. Not all ghosts are evil. Most of the spirits stay in the human world with obsessions, causing all kinds of weird and strange events. The spirit world has a loose order system. Yin Chai is not the traditional black-robed cold-faced image, but adopts a "part-time contract system". It recruits mortals with strong yang energy, light horoscopes, and courage. It focuses on efficiently handling trivial matters in the spirit world and sending away obsessive ghosts.
There are a large number of "blind spots in the spirit world" in the human world: old communities, abandoned public toilets, late-night convenience stores, and alleys in urban villages. These are places where ghosts gather to take orders and make trouble. The scary atmosphere mostly comes from environmental oppression and spiritual visions, while the funny points come from the weird obsessions of the ghosts, the protagonist's shady manipulation, and the outrageous rules of the sinister system, forming a sense of contrast of "frightening one second, laughing and laughing the next."
