Martin Bayerle, who first located the sunken RMS Republic in 270 feet of water south of the island Nantucket in 1981, makes his second major recovery mission to the wreck. The vessel, built in 1903 and sunk when she was inadvertently rimmed broadside in poor visibility in 1909, is rumored to have on board untold millions in face-value gold coins - an amount that could exceed $1 Billion in today's currency values. Bayerle, who was once imprisoned for manslaughter after shooting and killing a man who was having an affair with his wife and attempted to extort money from Bayerle to leave, may possess better information as to where on the wreckage the gold may rest; he's assembled a group of proven salvers, including his own son, to dive, explore, and if possible recover the entombed riches.