There is a taboo in the remote and closed "Suolong Village": every rainy night, "dead people" will crawl out of the mass graves behind the village and wander in the village. Their skin is gray and their eyes are hollow, and they are called "walking corpses." The villagers kept secret about this, only closing the doors and windows tightly before heavy rains, and covering the mirrors with black cloth - it is said that "walking corpses" can identify the breath of living people through mirrors. And all of this is related to a "sacrifice" that was covered up thirty years ago.
