The kingdom of Toaru is a prosperous and peaceful place that is famous for its magic. Within Toaru castle lies the Magic Gem which legend says can give the person who holds it great magical powers. Because of this, it is sealed inside the castle to prevent the gem from landing in the wrong hands.

One night, a dark figure and his army of monsters invades the castle and steals the gem. Armed with a sword and her magic powers, the Princess Toaru sets off to retrieve the gem and save the world.