Under the surface of the world we know well, there are "taboo cognitions" that cannot be seen directly. They are memes that distort reality, beacons that attract the grotesque.
Former forensic portraitist Shen Guan was forced to resign because of his eyes that could "see" the afterimages of crimes; rising reporter Xu Tingxia was troubled by a pair of ears that could "hear" the echoes of the deceased. A bizarre serial disappearance linked two people who were haunted by "abnormalities". They accidentally obtained a "Forbidden Cognition Manual", which recorded the rules for observing "abnormalities", and also made them the prey of "Reapers".
In order to survive, they must join forces, follow the strange guidance of the manual, and decipher urban legends that subvert common sense. However, the last page of the manual contains a warning: When you see through all taboos, you yourself will become a new taboo.
