After finding Nazi artifacts at a sunken pier, Darrell and his team continue their search to a site known as Target 3 where they find a possible component of a Nazi secret weapon that changes the direction of their investigation.

With weather preventing Darrell Miklos and the team from diving from the boat, they attempt a risky strategy. Garth makes a solo journey to explore a deserted island where he discovers a mysterious cross.

Treasure hunter Darrell Miklos and his team make a discovery far older than they expected. Later, new evidence emerges suggesting that the team may have uncovered a long-lost battle at Target 4.

Racing an incoming hurricane, Darrell Miklos and his team are forced to make tough choices; but after a season-long search, they locate the source of the massive magnetometer hit recorded at Target 4.