"When the photo fades, the name disappears, and even the person who loves you the most cannot remember your face... Can you still be sure that you really existed?"
When folk documentary director Cui Mingzhe was filming a century-old haunted house, his partner, the photographer, disappeared mysteriously. What's even more frightening is that this person has never been in anyone's memory. As the investigation deepens, he discovers that this mansion was once the scene of a mass murder, and the resentment of the victims turned into "faceless visitors" who specialized in devouring "proof of existence" of living people.
At the same time, Yin Xia, a nurse at the mental hospital, discovered that the Alzheimer's patient she was taking care of could suddenly clearly retell the details of the murder sixty years ago, and the medical records showed that the old man had never been to that ancient house. When Cui Mingzhe's figure automatically appeared in the patient's sketchbook, the two realized that their memories were being systematically erased by some force.
