In 1898, a Minnesota farmer clearing trees from his field uprooted a large stone covered with mysterious runes that tell a story of land acquisition and murder. The stone allegedly dates back to 1362. Initially thought to be a hoax, new evidence suggests the find 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. Follow the clues as experts use erosion studies on the rune stone...