The story begins with a sprite, named Yuki, who had control over the Heaven Jewel. Unfortunatly by some twist of fate, the Heaven Stone somehow split into two pieces. One piece was taken by the Mountain God, and the other piece was taken by the Sea God. Yuki asks for your help in retrieving the two pieces so that she can put the Heaven Jewel back together. The Mountain God transformed into the River King and the Sea God transformed into the Sea King. It's your job to go out into the world and fish up the two kings.