Doctor Julien Sauniere's quest for the Holy Grail has led him to a wild mountain valley in the remotest corner of France. The power-mad Duke of Lorraine wants him dead, but Julien finds an unlikely ally in Isabelle, the duke's own daughter. And no one, not even the duke himself, is aware of the Grail's ultimate secret. It's a truth so shocking it will literally cover the earth in blood Bittersweet goodbyes, magical duels to the death, and miracles both great and small await you in the final installation of the Rex Mundi epic.