Under the surface of the bustling city, there is an underground world of supernatural beings. As an anomaly investigator, Gu Yuan walks between light and dark, investigating various bizarre incidents. He met psychological counselor Shen Qing, police captain Zhao Yi, antique shop owner Liu Ruyan and others, and together they faced various supernatural phenomena and supernatural crimes. As the investigation deepens, Gu Yuan gradually discovers that all incidents point to a technology company called "Ark Technology" and its founder Ark. Ark seems to have mastered some kind of technology that can trigger the resonance of urban supernatural powers, and attempts to use supernatural powers to realize his ambitions. In order to stop Ark's conspiracy, Gu Yuan must unite all parties to reveal the truth and protect the balance of the city.
