Seiya is a young orphan sent to Greece, to the Sanctuary, to recover the bronze armor of Pegasus, and brought her back to Japan to the Kidô Foundation. Thanks to Marine, his coach, he succeeds, but back in Japan, he learns that Mr. Kidô died and that his granddaughter, Saori, succeeded him. He also learns that his sister, whom he had to see again on his way home, disappeared. He then chooses to participate in the knights' tournament in order to find her.