Interviews with experts and relatives fuel this investigative docuseries about the tragic 2017 disappearance of a military submarine that shook the world.

During the second world war, the Nazis looted everything they could get their hands on, including an estimated 600 tons of gold, thousands of pieces of artwork, and millions of priceless artifacts. While some of these items have been found, much of it remains missing. Treasure hunter Darrell Miklos believes some of these stolen riches were loaded into specially modified U-Boats that are currently lying at the bottom of the Caribbean Sea. His evidence: two top-secret documents acquired over 40 years of research.