The story takes place in a modern city called Nidu, where people are surging and information is exploding, but various bizarre events and unexplainable phenomena are hidden. As a bizarre incident investigator, Qin Ze discovered after an unexpected investigation that many suicides and disappearances were related to a mysterious 'urban spirit cave'. Working with self-media personality Tang Wan, they uncovered the intricate truth behind a series of urban ghost stories. The side character Wen Jiahe discovers a large number of virtual hidden dangers within the technology company and gradually exposes the abnormal flow of the city's data network, which complements the main plot. The villain Zhao Qi controls the city's information flow and turns paranormal phenomena into a tool to manipulate public opinion. The occasionally inserted stories of those who have experienced it bring in-depth reflections on human nature and social aspects to the main line. The book is divided into ten volumes. It not only advances the clues of the case, but also intersperses the growth and choices of ordinary people. It combines realistic logic and urban imagination to comprehensively explore the connection between the city and human nature and the way to survive in the era of information alienation.