In this special season premier, the gang make a host of discoveries including a secret trapdoor that leads them into the depths of Oak Island. Is it pirate treasure, a Viking hoard, or a lost biblical relic? No one knows, and anyone who has tried to find out has been met with dangerous setbacks—including booby traps! The Lagina brothers deploy technology like never before, but there’s an even bigger obstacle: A prophecy predicts seven people will die before the treasure is found. The death toll so far: six.