Set in a fantasy world, the story concerns Ryu, a young boy with the mysterious ability to transform into powerful dragons, who must discover the truth behind his origins, as well as locate his lost friends and surrogate family. The game's plot is presented in two parts: the first half concerning Ryu as a child, and the second half as an adult. He is accompanied by a number of supporting characters who aid him on a journey that leads them across the world, eventually confronting a mad goddess.