In order to save money, {Xu Zhixia} moved into a low-cost rental house in the old city. There was a frameless ancient mirror hanging in the room. The mirror was mottled but always gave off a strange cold light. Since moving in, strange things have happened one after another - every third watch, a woman in red will be reflected in the mirror, her movements are completely synchronized with her, but no one turns around. What's even more frightening is that Xu Zhixia's intermittent amnesia is becoming more and more serious. His memories at night are frequently interrupted, and the rental house surveillance system always displays a snowflake screen every third update. Occasionally, she found a line of small words on the back of the mirror: "The soul in the mirror lives for others." It turns out that the woman in red in the mirror is the tenant who committed suicide many years ago. She is using the ancient mirror to devour her soul in an attempt to replace her. The signs of soul being eaten are becoming more and more obvious. Xu Zhixia must destroy the ancient mirror before it is completely replaced. But she doesn't know that behind this mirror, there are still countless devoured souls. A life and death battle quietly unfolds every third watch of the night.
