In September 1740, during an imperial conflict with Spain, the Wager, carrying some 250 officers and crew, had embarked from Portsmouth in a squadron on a secret mission: to capture a treasure-filled Spanish galleon known as “the prize of all the oceans.” Near Cape Horn, at the tip of South America, the squadron had been engulfed by a hurricane, and the Wager was believed to have sunk with all its souls. But 283 days after the ship had last been reported seen, these men miraculously emerged in Brazil.