The novel opens as a theatre programme, with this telling credit: ‘Illumination by HERCULE POIROT.’

Light must be shed, indeed, on the fateful dinner party staged by the famous actor Sir Charles Cartwright for thirteen guests. It will be a particularly unlucky evening for the mild-mannered Reverend Stephen Babbington, whose martini glass, sent for chemical analysis after he chokes on its contents and dies, reveals no trace of poison. Just as there is no apparent motive for his murder. The first scene in a succession of carefully staged killings, but who is the director?