Sir Harry Oakes was probably the wealthiest man murdered in the 20th century, and the crime remains unsolved. Oakes, who made his fortune in the gold fields, had established himself in Nassau to avoid taxes in time for World War II. There he fell in with the Duke and Duchess of Windsor and a Swedish magnate named Axel Wenner-Gren, who lived aboard the yacht he had purchased from Howard Hughes. Wenner-Gren, the Windsors and Oakes were all known Nazi sympathisers. Meanwhile, novelist Ernest Hemingway had convinced allied naval authorities to allow him to hunt German U-Boats aboard his boat Pilar, assisted by a group of tough-guy volunteers. It so happened that Oakes was murdered at the same time that Hemingway was conducting his final patrol in remote waters on Cuba's North Coast. Pilar had the range to make Nassau, and one newspaper report noted that a black boat had been sighted in Nassau harbor around the time Oakes was killed. What if?