Lin Zhiyu, a 24-year-old urban white-collar worker, was forced to return to the secluded Qingwu Village with vague memories after his grandfather passed away. The old house has strict ancestral rules, and three rules are engraved in people's hearts: do not look in the mirror at midnight, do not answer the knock on the door, and do not mention the "woman in red". At first she just dismissed it as a superstition of the older generation, but little did she know that from the moment she stepped into the old house, she was involved in a bloody mystery that spanned three generations.
Late at night on the third day of observing mourning, Lin Zhiyu was awakened by a strange noise coming from the main room. Through the crack in the door, she saw the red cloth on the bronze mirror moving without wind, with a faint white light coming out. Then, a soft call sounded in her ears, strange and strange. Since then, strange things have continued one after another. Fragments of red clothes appear on the ground of the old house. Doors knock frequently in the middle of the night. Lin Jianjun, the distant uncle, crazily chants "red clothes, mirror, don't open the door." The villagers' eyes dodge and they keep secret about the past of the old house.
In order to find the truth, Lin Zhiyu met Su Nian, a graduate student who came to investigate the folk customs of the mountain village. The two teamed up to investigate and pried open the attic that had been locked for many years, found the incomplete diary of the great-grandmother, and dug up a skeleton dressed in red under the peach tree in the backyard. As the clues unfold, she gradually discovers that the ancestral precepts were never meant to ward off evil spirits, but to cover up secrets - Wan Niang, the woman in red, was not an outsider as rumored, but her great-aunt. She was framed to death and her body was secretly buried. Her grandfather's death, her cousin's madness, and the villagers' concealment were all related to this unjust case.
When she thought the truth was about to come out