In 1898, a Minnesota farmer uproots a large stone covered with mysterious runes. Now known as the Kensington Rune Stone, it details a journey of land acquisition and murder-- in the year 1362. Thought by some to be a hoax, new evidence suggests it could be real, and a clue that the Knights Templar discovered America 100 years before Columbus, perhaps bringing with them history's greatest treasure-- the Holy Grail. See how symbols on the Rune Stone match Templar ruins all over Europe, on islands across the Atlantic Ocean, as well as in Massachusetts and Rhode Island.