An old widow is brutally killed in the parlour of her cottage... `Mrs McGinty's dead!'`How did she die?'`Down on one knee, just like I!' The old children's game now seemed rather tasteless. The real Mrs McGinty was killed by a crushing blow to the back of the head and her pitifully small savings were stolen. Suspicion falls immediately on her lodger, hard up and out of a job. Hercule Poirot has other ideas - unaware that his own life is now in great danger...