Lin Xi lost his memory due to a car accident and only remembered that he was a folklorist. She accepted her mentor's arrangement to go to the remote ancient town "Misty Hidden Town" to investigate local funeral customs, hoping that familiar field work could stimulate memory recovery. During the investigation, she discovered that a bizarre murder occurred in the town every seven years, and the deceased were all placed in ancient sacrificial postures. Lin Xi's notes, items and even dreams show that she is secretly related to the murder, and the young mayor Lu Huaizhou who has been helping her seems to be hiding something. When the latest murder occurs and all evidence points to Lin Xi, she must uncover the truth behind the centuries-old curse in the ancient town within three days. In the end, she discovered that the curse originated from a collective sin that was covered up, and that she had been here in another identity many years ago. Her amnesia was self-protection and the beginning of redemption.
