Nicky Campbell hosts a series of moral, ethical and religious debates.

At the insistence of Ruth Van Rydock, an old schoolfriend who is convinced that there is something wrong, Miss Marple agrees to visit 'Stonygates', the country house of Ruth's sister.

Miss Marple, the spinster detective who is one of the most famous characters created by English crime writer Agatha Christie, is portrayed by Joan Hickson who starred in a dozen television mysteries about Miss Marple over the course of a decade.