Wan Yi ventured into the haunted house beyond the village, only to find an old man's corpse. After burying the body, he left. Back in the village, he learned from the elders that the haunted house had once been the village's only hospital, and that the dead man might have been the doctor who lived there. Some time later, the poisonous fog that had shrouded the village for so long suddenly lifted, but the villagers, already accustomed to it, began falling seriously ill one after another. To find a way to save them, Wan Yi returned to the abandoned hospital, which should have been empty. There, he encountered a young man about his own age named Gao Qiao...