Marie is a fighter who sells her skills to the highest bidder. With her friend and blood brother, William, she fights the 'Dragons' – strange creatures that hover on the borderline of reality. Without William's help, she would never have survived. Now William has disappeared, has been kidnapped. And the ransom to get him back? Keys... The keys to unlocking the mystery of this world, the answers behind its creation. In Bayeux, the Emperor of France fights against the English in what would be, in another world, the beginning of the Hundred Years' War. And the battle does not turn in his favor. But there is so much more at stake than the fate of France...