A young boy, Sho Moritou dreamed of soaring high above the skies, flying his own plane. But, he is afraid of heights. Sho had a terrible accident on a plane with his parents, causing his father and mother their deaths. He now lives with his uncle at a farm he owns. He lives peacefully and continues to grow older as time goes by, until one day, walking back to the farm, he sees a person falling down from the sky. He decided to investigate and found himself searching for the person that fell in a forest, far from his uncle's farm. He then meets a strange girl that doesn't remember a single thing about herself, where will the world take these two? What adventures wait for them ahead?