Gu Yan, a college student, has the ability to perceive abnormalities. He came into contact with various strange events by writing urban legend articles. With the help of criminal police captain Shen Qing and psychiatrist Su Mucheng, Gu Yan gradually uncovered the secrets hidden behind the city. At the same time, a mysterious organization called "Observers" also surfaced, and they seemed to be controlling everything secretly. Gu Yan, Shen Qing, and Su Mucheng launched a fierce confrontation with the observers and other forces lurking in the dark, and finally uncovered the truth about the world and found their respective destinations.
