Shiori'anma, the only princess of Kiata, has a secret. Forbidden magic runs in her veins. And on the morning of her betrothal ceremony, Shiori loses control. At first, her mistake seems like a stroke of luck, forestalling the wedding she never wanted, but it also catches the attention of Raikama, her stepmother. A sorceress in her own right, Raikama banishes the young princess, turning her brothers into cranes, and warning Shiori that she must speak of it to no one: for with every word that escapes her lips, one of her brothers will die.