1913, shortly before the outbreak of WWI. A group of aristocrats gathers at the estate of Sir Randolph Nettleby for a weekend shoot. As the terminal decrepitude of a dying class is reflected in the social interactions and hypocrisy of its members, only world weary Sir Randolph seems to realise that the sun is setting.

Two strangers, both married to others, meet in a railway station and soon find themselves in a brief but intense affair.