November, 1923. An invitation to a house party at the estate of Parkview Hall is a welcome respite for Olive Belgrave, a newly minted working girl who's become the solver of high society's trickiest problems. But when the sumptuous black tie event turns deadly, Olive's cousin Peter becomes the main suspect. Olive must unmask a sophisticated killer before an innocent man takes the blame . . . because murder doesn't RSVP.