Rick and Gary are blown away when they discover what appears to be a British coin from the 1800s. But, assumptions are smashed when archaeologist Laird Niven suggests that it may be from as early as the 1500s. 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?