While travelling in London, Jeffrey Buckenham (Paul Massie), a World War II veteran pilot from Canada, sees Baronet Sir Mark Sebastian Loddon (Dirk Bogarde) on television, leading a tour of his ancestral home in England. Buckenham recalls that he was held in a POW camp in Germany with then Major Loddon, who the Germans captured during the Dunkirk evacuation of 1940. Buckenham is convinced that Loddon is Frank Wellney, a British actor (also played by Bogarde). Wellney and Loddon shared their POW hut in 1945 and bore uncanny resemblances to each other.