Zeng Xian'er inherited the property rights of "Qiming Apartment" in the old city because her mother fell mysteriously from the building. This building was built in the 1990s. The exterior walls are covered with dead vines, and the corridors are filled with a damp musty smell all year round. All the residents look strange - the old lady in Room 402 who always ties up old dolls with red rope late at night, the tenant in Room 501 who never shows up but can accurately tell each household's schedule, and the woman in Room 203 who always knocks on the neighbor's door at three in the morning to borrow "non-existent soy sauce."
He moved into Room 302 with half of the yellowed floor plan that his mother had held in her hand before she died. He tried to find out the truth about his mother's death, but soon fell into a series of strange things: dark red liquid dripped from the bedroom ceiling every night, there were always more old clothes that did not belong to him in the closet, and his mobile phone frequently received text messages from "canceled numbers", all of which contained his mother's daily conversations during her lifetime.
When he met Fifei, a policewoman who was investigating a serial disappearance case, in the corridor, the two discovered that the anomalies in the apartment were no accident - in the past ten years, 17 people who had stayed in Qiming Apartment either disappeared or died in "accidents", and each of the deceased had seen a little girl wearing a white dress and a pair of ponytails. As the investigation deepens, they gradually come into contact with the secrets hidden in the apartment: the "ghost room" with missing floor plans, the sealed sacrificial array in the basement, the "rules" that the residents jointly guard, and the past event about "sacrifice" that has been deliberately forgotten by everyone. The death of Zeng Xian'er's mother is just the latest link in this cycle of terror that has lasted for twenty years.
