The legend of the Holy Grail is the greatest unsolved mystery of the last two thousand years. The cup used by Jesus Christ at the Last Supper has inspired countless searches in numerous countries by adventurers, knights and kings. Believed to confer power and immortality on those who possess it, it has so far remained an elusive relic. But new evidence has turned up. We will follow two of the world's most experienced Holy Grail hunters, Graham Phillips and Henry Lincoln, to stunning and remote locations in France and England. Supported by expert interviews, we'll learn that both adventurers have made startling new discoveries that revolutionize the whole concept of an ancient and enduring legend.