Shiori'anma, the only princess of Kiata, has been cursed with forbidden magic. When she accidentally reveals her abilities on the morning of her betrothal ceremony, her stepmother Raikama, a powerful sorceress, banishes her and turns her brothers into cranes. Forced to never speak of her powers or else her brothers will die one by one, Shiori sets off to save her brothers. With the help of a paper bird, a mercurial dragon, the boy she never wanted to marry, and the magic she's been forbidden to use, Shiori discovers an even larger conspiracy that puts her whole family in jeopardy.