A message from a dead acquaintance prompts a bus tour to an unknown crime! In utter disbelief Miss Marple read the letter addressed to her from the recently deceased Mr Rafiel an acquaintance she had met briefly on her travels. Recognising in Miss Marple a natural flair for justice, Mr Rafiel had left instructions for her to investigate a crime after his death. The only problem was, he had failed to tell her who was involved or where and when the crime had been committed. It was most intriguing.