Widow Zhou, who has been widowed for more than ten years, lives a peaceful country life in a dilapidated house. The Li family's eight-year-old son Yongzi suddenly disappeared, breaking the peace of the whole village. When the person was found, he became demented and could only lie on the ground meowing like a cat, babbling, and could no longer utter a complete sentence. Rumors spread around the village. Some said that he was hit by an evil spirit, while others said that he was caught by something unclean. Only Widow Zhou was feeling uneasy. She was observing in secret, and the more she investigated, the more frightened she became - this sudden change was not an accident at all. There seemed to be an invisible net hidden behind it, a conspiracy that was terrifying if you think about it carefully.