Percival lives alone with his grandfather Bargis, at the top of a high mountain named the Divine Finger. He leads a happy life there, preserved from the outside world. But on the day of his 16th birthday, his destiny is changing: a mysterious warrior with red armor is violently attacking him and his grandfather. Indeed, this sacred Knight of Camelot is responsible for eliminating anyone who is similar to the "Four Knights of the Apocalypse," a group of horsemen who, according to the prophecy, will appear to overthrow King Arthur... Left for death, Percival survived his wounds and decided to go in search of revenge, and adventures!