In November 1932, Constance, Countess of Trentham (Maggie Smith), and her lady's maid, Mary MacEachran (Kelly Macdonald) travel to Gosford Park for the weekend for a hunting party. On the way, they encounter actor Ivor Novello (Jeremy Northam), American film producer Morris Weissman (Bob Balaban) and Weissman's valet, Henry Denton (Ryan Phillippe), who are also attending the hunting party.