Rick and Marty join Roger Fortin for a daring adventure into the depths of the earth. Operating under his construction company, Roger has been drilling into the island's old complex of mines. But, as they make their way into the bowels of the earth, the trio are inundated by a torrent of water. Rick, Marty, and the team return to Oak Island and immediately uncover evidence of a mysterious tunnel in the Money Pit. The Fellowship gets a clear look at an underground structure. Are they closer than ever to solving the 227-year-old mystery?