Captain Lord Ramage and the Calypso return from Devil's Island, but Ramage's new wife Sarah is missing. The captain would like nothing better than to sail home immediately, but instead he is ordered to shepherd a lumbering convoy of merchant ships back to England. On the way, bizarre events lead him to a full court martial in Plymouth, presided over by his old nemesis, Rear-Admiral Goddard. Ramage must clear his name-or face a sentence of death!