Ten years earlier, a colossal assault by the Erebonian Empire nearly crushed the Kingdom of Liberl, striking deep into Capital City before being repelled by a resolute counterattack commanded by Cassius Bright. Today, the invaders linger at the northern frontier, lusting after Liberl"s arcane arts and advanced technology, while the realm gradually recovers with help from the Bracer Guild, whose enchanted manipulation of "Craft" proves more vital to defense than the regular army. For young Estelle Bright, daughter of Cassius, these events are merely old lore they studied as children. Yet history tends to repeat itself; as the siblings prepare to enlist in the Bracers Guild, hidden enemies plot to thrust them into the same perilous family situation—being caught in the worst spot when chaos erupts. When their father"s airship vanishes unexpectedly, it is only natural that the two bright yet inexperienced teens would launch a rescue mission of their own. The family is thrown into uncertainty, and the siblings realize that their own skills might be the key to survival.