Kunisaki Yukito carries two legacies from his deceased mother: a handmade doll and a final wish — that he find the "girl in the skies," a myth-like figure she believed it was his destiny to reach and save. Half-understanding what she meant, Yukito has been wandering across Japan searching for this girl for years. His latest stop is a small, sleepy coastal town at the start of summer. There he meets a young girl named Misuzu, and something in that encounter sets the wheels of a destiny he has only half-believed in turning for the first time.