Ten years ago, the forces of the Erebonian Empire invaded the Kingdom of Liberl, nearly reaching the heart of the Capital City before Cassius Bright led a determined counteroffensive that drove them out. Liberl has managed to rebuild by using the special mix of magic and technology that the Erbonians covet. As they prepare to join the Bracers, whose use of "craft" is vital to the nation's defense, Cassius' daughter Estelle and her adopted brother Joshua learn all too well that the threat of another invasion is ever present. When Cassius' airship suddenly goes missing, the younger members of the Bright family find themselves at a pivotal point in history, deciding to launch a rescue mission by themselves!
In the southwest area of the Zemulia Continent, one will find the tiny Liberl Kingdom, a small monarchy that has managed to defy all odds against attempts to overcome them during war. Liberl is split into five regions: Rolent, Bose, Ruan, Zeiss, and Grancel. In the city of Rolent, Cassius Bright has raised two children by himself, Estelle and Joshua. He taught them everything they know himself, and encourages them to sign up to become apprentices in the Bracers Guild. Soon after, however, he receives a letter and has to leave on business, leaving Estelle and Joshua to fend for themselves. While working, they receive notice one day that their father's airship has gone missing. With this in mind, the two gear themselves up, and set off to find the ship and save their father.