The personal ad posed a simple question: Are you happy? If not, consult Mr Parker Pyne. The answer is a resounding no for a jealous wife who suspects her husband of infidelity... for a lonely widow driven to assume a new identity... for a distraught mother whose son has been kidnapped... and for the finance of a strangely reclusive bride-to-be. But what sort of detective would solicit in the personals? The sort who has a knack for investigating affairs of the heart. For therein lie the darkest motives for murder. And they are proving most lucrative for the hopelessly romantic - an highly suspicious - inspector Parker Pyne.