He is the night shift gatekeeper of a funeral parlor. He appears to be an ordinary wage earner, but in fact he is an ancestral "funeral Feng Shui master" (specializing in dealing with ghost houses, funeral Feng Shui, and saving the souls of the dead).
The entire street where the funeral parlor is located is actually a node of "Hundred Ghosts Walking at Night". Every midnight, strange events will occur at the intersection of yin and yang.
The protagonist unintentionally rewrites the fate of the living by adjusting the coffin position, cemetery position, and burial time of the deceased, and is involved in a series of major events such as feuds between wealthy families, family curses, and ancient seals.