The story is set in the 'Yinjie' - an urban area where ordinary daytime becomes a supernatural market at night. Su Chen has been able to see spirits since he was a child, but has been avoiding them. One night, he accidentally got involved in a supernatural incident and was rescued by Mr. Cat. From then on, he and Shen Yufu, Uncle Li and others started a humorous and thrilling supernatural investigation career. The trio left behind a series of humorous and horrifying cases in the mystery book, from ghosts complaining about grievances, cracks in the Gate of the Underworld, to a battle of wits and courage with the ghost king Lingye behind the scenes, and finally revealed the truth about the Yinjie incident that broke out. Su Chen grew up to be a spiritual person who could truly face fear and responsibility, and everyone also gained courage and friendship in the supernatural world.
