In the midst of Kuzukago Mountain, a dumping ground for society's unwanted, resides Poi, a skilled young girl with a knack for fixing broken things. During her scavenging for repairable items, she encounters an unconscious man in a discarded ambulance. Surprised by the abandonment of such a valuable individual, Poi crafts a prosthetic arm for him and introduces him to the peculiar world of the mountain. As the man explores this unique community, he starts to reevaluate his beliefs and perceptions.