A thousand years after its disappearance, the Mystic Rose -- the fabled Chalice of the Last Supper -- has been found, and the warrior monks of the Knights Templar, led by the ruthless and corrupt Renaud de Bracineaux, will stop at nothing to possess it. One brave, dauntless noblewoman stands in their way ...

Born among the hills of Scotland, and raised on the Crusader tales of her grandfather, Murdo, and her father, Duncan, young Cait is determined to claim the Holy Cup for her own. Guided by a handful of clues gleaned from a stolen letter, Cait and a small band of knights follow a treacherous trail that leads from the shadowed halls of Saint Sophia into the heart of Moorish Spain and a world long unseen by Christian eyes. A journey whose end means victory ... or death.