Poirot is excited when Belgian's greatest film star contacts him to meet while she is in London. But when he arrives he finds her terrified by a series of threatening notes hand delivered to the hotel's front desk from a Chinese man, stating that a precious diamond she owns will be stolen. The next day, Poirot receives a call from another woman who owns a duplicate diamond, stating that she too has received threatening notes, but this time through the post. When both diamonds disappear, it le ...[Read Story ]