For all its fame, the Holy Grail remains shrouded in mystery. What exactly was it? Could it have survived to this day? Why has it inspired so many treasure seekers? To Christians, it is the holiest of objects, the cup from which Jesus drank at the Last Supper, also believed to be the chalice that Joseph of Arimathea used to catch Christs blood as he died on the cross. Though now thought of as a goblet, the actual word ""grail"" comes to us from the Latin word gradalis--a flat dish or shallow vessel brought to the table during various courses of a meal. The story itself did not originate until medieval times, when it helped inflame the Crusaders quest. Host and adventurer Josh Bernstein follows the Grails trail from Holy Land to medieval French castles to a dark chapter in the Nazi saga, when Hitler financed a search for the Grail to unite a secret society of knights. On the way, Josh learns its true meaning and power.