For more than five centuries, a mysterious group of white‑haired children has appeared at various times and places throughout Europe. Although they always look like 11‑year‑olds, they behave with surprising maturity, never age, and seem to possess supernatural powers. Their quest is to find a girl, and the only clue they have is a picture of a crescent moon. In 2012, an athletic boy named Tohma becomes entangled in this centuries‑old mystery.