一個充滿謎團的小島坐落在加拿大新斯科舍省海岸線一隅。橡樹島底下究竟藏著什麼？是海盜寶藏、維京部落，還是基督教聖物？無人知曉，所有嘗試找出真相的尋寶者們都遭遇到始料未及的困難：詭雷。這一季中、拉吉娜兄弟前所未有的應用各種科技，這次很可能成功，雖然仍然困難重重，包括一則古老預言指出在寶藏被找出之前，必定會有七個人死亡，上回他們數過，至今死亡人數還停留在六人。
Off the coast of Nova Scotia is small island that's a riddle, wrapped in a mystery, inside an enigma. What lies beneath Oak Island? Is it a pirate treasure, a Viking horde, or even a lost biblical relic? No one knows, and anyone who has tried to find out has encountered an unexpected problem: booby traps. This season, the Lagina brothers deploy technology like never before. This could be it, but there will be obstacles, including an old prophecy that predicts seven people will die before the treasure is found. The last time the brothers counted, the death toll was at six.
