English mapmaker Reginald Anson (Hugh Grant) manages to offend an entire Welsh town when he rules that their prized landmark is not a mountain but a hill. Anson is soon to find, however, that the locals will stop at nothing to defend their honour, and spearheading their efforts with young barmaid Betty (Tara Fitzgerald), who tries to seduce Anson and thus convince him to change his ruling as regards the 'mountain'.