Detective Captain Lu Han wanders between the crime and strangeness of Jiangcheng. Every case is accompanied by inexplicable paranormal phenomena: mirrors whispering at midnight, bloodstains left by the deceased, unanswered distress calls... As he investigates the truth, the "thing" in the darkness quietly approaches, uncovering his secret connection with the paranormal world. On the edge of life and death, can Lu Han break through the fog or become the next prey to be gazed upon? Terror and suspense intertwine, and a battle in the dark night begins!