Ten years after the Dragon Knights' victory brought peace to the land, a young man named Rike journeys to a small village in pursuit of his goal to join their ranks. Upon arrival, he encounters a local girl named Karisu who initially mistakes him for a thief. When survivors from the vanquished Dragon Devil clan strike the village without warning, Rike learns there is far more to Karisu than appears on the surface, beginning a series of events that intertwine their fates in unexpected ways.