The Oak Island team are busy excavating a series of bore holes when they discover fragments of wood buried in the dirt. After some testing, they're amazed to learn that they may hold the key to the island's lost treasure. Is the secret to Oak Island 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.