Brothers Rick and Marty Lagina now own most of the mysterious Oak Island. Determined to resurrect the 200 year old search for treasure, they explore an abandoned shaft called 10-X. What they find gives them reason to believe that the stories of something buried on the island may very well be true.

When the team discovers something very unusual at Smith's Cove, Rick and Marty Lagina believe they've made a huge breakthrough in unlocking Oak Island's secrets.

As Rick and Marty Lagina begin work to drain a mysterious swamp, they are visited by a woman who lost her father and brother to a tragic accident on Oak Island that gave rise to rumors of a deadly curse.

A visitor to the island presents Rick and Marty Lagina with his incredible theory about where the treasure on Oak Island is located.