Sinbad and a boy named Ali stow away aboard the transport ship Boulder, and they earn real places among the crew once they win over the captain. Their voyage changes when the beautiful Princess Samir leaps aboard to escape a wicked minister who wants to marry her. Sinbad then faces one adventure after another to keep the princess safe, including a wild fight with a strange bird that guards diamonds. Toei Animation produced this action fantasy film, with a screenplay by Osamu Tezuka written in cooperation with novelist Kita Morio, and it draws its dramatic episodes from the original Arabian Nights tales.