Stiff Upper Lips is a broad parody of British period films, especially the lavish Merchant-Ivory productions of the 'eighties and early 'nineties. Although it specifically targets A Room with a View, Chariots of Fire, Maurice, A Passage to India, and many other films, in a more general way Stiff Upper Lips satirises popular perceptions of certain Edwardian traits: propriety, sexual repression, xenophobia, and class snobbery.

During the final weeks of a presidential race, the President is accused of sexual misconduct. To distract the public until the election, the President's adviser hires a Hollywood producer to help him stage a fake war.