In April 1996, a group of amateur divers made the most important and valuable discovery of Islamic gold ever. But what was the 17th century vessel was doing laden with treasure, and how did it sink off the coast of South Devon? One theory is that it is the wreck is a Barbary Pirate Ship. For two hundred years, the Pirates brought terror to European waters, plundering shipping and coastal villages for white slaves' to be ransomed or sold in North Africa. A professional team now explores the site in an attempt to reveal the vessel's true identity.