The Axiom Diamond is a mythical relic, with the power to show its bearer any truth they desire. Men have sought for it across many continents for centuries, but in vain. When trainee sorceress Aimee de Laurent's first ever portal-casting goes awry, she and her mentor are thrown into the race to find the gem, on the skyship Elysium. Opposing them are the infamous magic-wielding knights of the Eternal Order and their ruthless commander, Lord Azrael, who will destroy everything in their path...