In the 13th century, over a few decades, a huge literature emerged around an unlikely tale. Survivors of the core of early Christianity make a perilous journey to Western Europe. They begin a hidden bloodline, preserve immensely powerful relics of the crucifixion, and carry a secret which, if revealed, would turn the established church on its head. A.E. Waite gets to the core of the Grail legend, an interwoven mass of narratives which started with seeds of pagan folklore and grew into a massive allegorical Christian epic.