A torrential rain washes open an ancient coffin on a river shoal, where a woman in red has slept for a century with her appearance unchanged. Strange occurrences happen frequently after villagers approach her, including hearing singing at night and shifting objects. An elder who understands folklore suggests sending the coffin back to the ancestral mausoleum. During the funeral procession, the mountain paths become lost and the sedan chair suddenly becomes heavy, and someone faints after touching the objects inside the coffin out of greed. When a young girl hears the grievances and past events of a century ago in a desperate situation, the stone gate of the mausoleum suddenly closes, and everyone falls into an ancient maze even more terrifying than the legend.