A category four hurricane whips West Florida, destroying homes and taking lives. The storm thrashes reefs and buries known shipwrecks--but it also exposes new ones. Then one night a stranger shows up at Doc Ford's laboratory. The elderly visitor relays an amazing story of her lover lost at sea during World War II while attempting to contact a Nazi submarine. The woman is sure he was being blackmailed--and now the truth may finally be within her grasp. Taken by her story, Doc investigates. It doesn't take long before he meets the rather unpleasant men working the same case from the other side.