Ryoko Matsumori is your average teenage high school girl in an average world. But her life is turned upside down when she is pulled through a portal that leads to another dimension, a dimension of dragons and mythical creatures. It is there that she meets Ryuunosuke "Ryuu" Yamaryuu, a dragon rider. Little does she know that she is to play a part in an ancient prophecy. Ryoko now begins her quest to return home and save the world from the evil Dark Lord. With the help of Ryuu and her friends, she will save the world.