Eight years after they overthrew Churchill and led Britain into a separate peace with Hitler, the upper-crust families of the Farthing set are gathered for a weekend retreat. Among them is estranged Farthing scion Lucy Kahn, who can't understand why her and her husband David's presence was so forcefully requested. Then the country-house idyll is interrupted when the eminent Sir James Thirkie is found murdered - with a yellow Star of David pinned to his chest. Lucy begins to realise that her Jewish husband is about to be framed for the crime.