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.

A war veteran tries to investigate the murder of his son who was working as a Russian translator for the British intelligence service during the Cold War. He meets a web of deception and paranoia that seems impenetrable...