The marriage between the two factions splitting the Atlatan Continent into two, the great Archdukes of the Factory Alliance and the Fantasia Union, collapses when the Great Hall Tragedy seizes the magical city of Eramu. The path to peace is shattered, and the continent ushers into an era of war once again.

On her way to the eastern territory of Altirk, the mage Siluca Meletes is attacked by forces from Clovis, an enemy territory. This is when she encounters Theo, a young man with a Crest. Impressed by Theo’s ambition, Siluca enters into a contract with him as his mage.