Series features a crew of rugged divers and sailors from Washington state who travel to the infamous Skeleton Coast off the dangerous coast of South Africa, renowned for shipwrecks, to mine for diamonds. The crew is led by Captain John, a big-game-hunting, Harley-Davidson-riding, hardscrabble, financially ambitious boat captain. John's crew members include his son, Jason, a master diver with the occasional temper like his father. The men work for Panda Marine, an international diamond mining and exploration company specializing in marine mining.