Summoned by the wayward Lady Imogen Swain, Jemima is entrusted with the diaries she kept in 1964, diaries which contain an account of her passionate affair with Burgo Smyth MP; now Foreign Secretary but then a rising young Conservative politician.

With the increasingly eccentric Lady Imogen threatening to reveal details about the affair, and of the subsequent disappearance of a young journalist, Jemima's meeting with Lady Imogen is the first step in a sinister series of events which leads to political scandal, blackmail and murder.