In this game, the player takes the role of Adol (Aron in the English-language Sega Master System version) Christin, a red-haired adventurer and expert swordsman. One day he encounters a fortune teller who sends him on a quest to find information about the six books of Ys. It appears that there was once an ancient land called Ys, whose secret was sealed in those six books. Before long Adol learns that the six books were all stolen by the evil wizard Dark Fact (Dulk Dekt in the Sega Master System version, Malificus in the English-language computer versions). It is Adol's task to defeat the villain and discover the secret of Ys!