"When Hercule Poirot and his associate Arthur Hastings arrive in the French village of Merlinville-sur-Mer to meet their client Paul Renauld, they learn from the police that he has been found that morning stabbed in the back with a letter opener and left in a newly-dug grave adjacent to a local golf course. Among the plausible suspects are Renauld's wife Eloise, his son Jack, Renauld's immediate neighbor Madame Daubreuil, the mysterious 'Cinderella'...