A group of American executives making a film about World War II decide that since their lead is rather unglamorous, they will draft in an American G.I. to play the part of Winston Churchill. Their take on the war depicts a handsome Churchill falling in love with Princess Elizabeth, who is herself involved in the war as an undercover agent. Together the glamorous couple uncover a secret plot within the royal palace itself and battle to save the world from the evil clutches of Hitler.