Romancing SaGa 2

Long ago, seven noble warriors defeated the ultimate evil, and brought peace to the world. But the memory of the humans is short... wars begin, breaking the world's harmony, and now the world is threatened by seven demons. Emperor Leon of Avalon tries to rid the world of the demons. One day, he goes on a treasure hunt, accompanied by his son and heir, Gerard. But the emperor is slain by a horrible monster, and now Gerard, the child of royal blood, has to continue his work. (mobygames.com)