"When you hear a child singing that nursery rhyme, the countdown to death has already begun..."
Best-selling suspense writer Xu Ang received a mysterious invitation from his old classmate Zhou Yuan to go to the isolated Wuyin Village to find creative inspiration. This village shrouded in perpetual fog hides a horrifying secret - every twenty years, nine villagers will die in the order of the lyrics of the old nursery rhyme "Ten Little Black Men", and the tenth victim must be a stranger.
When Xu Ang arrived at the village, Zhou Yuan had disappeared. In the middle of the night, children's singing came from the old house where they stayed, the wardrobe opened automatically for no reason, and wet little handprints appeared outside the window... As the investigation deepened, Xu Ang discovered that this cycle had lasted for more than eighty years, and all clues pointed to the strange seven-story stone tower behind the village. With the help of folklorist Lin Yuqing, he must solve the mystery before the "Red Moon Night", otherwise he will become the last sacrifice in a new round of rituals.
