A legend in Taiwan`s mountains tells of a figure in a yellow raincoat who leads lost hikers down blurry paths to their disappearance. A local temple has performed rituals for generations to appease these mysterious beings, and the rituals cannot be interrupted. Five years ago, Chen Jia Ming, Song Yu Xin, and Zhang An Wei went hiking and accidentally interrupted the ritual, causing Zhang An Wei to disappear. Five years later, they returned to search for him, only to be lured by a yellow-clad group. Zhang An Wei`s ghost appeared, seeking revenge. Chen Jia Ming slowly unravels that their past mistake angered the Mountain Demon. To atone, he sacrificed himself, becoming another missing person.