Abandoned items and solitary individuals, from children to discarded newspapers, plague Kuzukago Mountain. However, amidst all of this, there is a skilled and capable young woman named Poi. She possesses a remarkable ability to repair nearly anything. While searching for salvageable items, Poi discovers an unconscious man inside a badly damaged ambulance. She is intrigued by the man's great intelligence wasting away and so she gives him a prosthetic right arm. Poi invites him to join her on an adventure to explore the mountain. This experience prompts the doctor to reevaluate his surroundings.
