Chen Yuan worked as a night shift security guard at Chengnan Funeral Home for ten years. He is familiar with the coldness of every inch of floor tiles, the halo of every ever-burning lamp, and the various subtle, unexplainable sounds in the middle of the night. He always thought that those were just the sighs of old buildings, or his overly nervous hallucinations. Until the new corpse cosmetologist, while putting makeup on an unknown female corpse, suddenly rushed out screaming, saying that the corpse just blinked at her. Chen Yuan was called to check. Under the flashlight beam, the female corpse was lying quietly. Her makeup was exquisite, except for the corner of her mouth, which had a very faint and strange arc that he could not erase with all his efforts.