The Moving Finger is a famous detective novel written by Agatha Christie. The book offers plenty of riddles and mysterious events. Jerry Burton, a former pilot, is recovering after a plane crash. Following his doctor's advice, the man decides to get away from the city noise. Together with his sister Joanna, he rents a house in a small village of Lymstock. But the place doesn't seem as quiet as they had expected. Very soon, the Burtons get a rude anonymous letter hinting they are not really brother and sister. Later it turns out that they are not the only people in the village tormented by the unpleasant letters. However, many local citizens take it as a bad joke until one woman commits suicide after receiving a similar letter. Now everyone who knows something about her death is in real danger.

The local newspaper has printed a strange announcement said that a murder would happen on Friday, the twenty-ninth day of October, at 6.30 p.m. in the little Peddoks, and everybody is invited. Little Peddoks - a small mansion, inhabited by elderly Miss Letitia Blacklock, her childhood friend Dora Banner, nephews Patrick and Julia Simmons-immigrant housekeeper Mitzi, and the young widow of Philip Hames. Some of villages supposed that the announcement is Patrick's joke, who is well-known lover of practical jokes, some people think that this is a smart invitation to the party. In the little Peddoks everyone has also learnt about this joke from the newspaper. Realizing that the party at the appointed time would be exactly hold, the owners were prepared to accept it, although they have been very excited and a bit confused.

Miss Marple goes to pay a visit to her old friend Ruth Van Ridock. They studied together in Italy. Ruth tells Miss Marple that there is something wrong in the mansion where her sister Carrie Louise and her husband Lewis live. Miss Marple agrees to visit Carrie Louise and find out what is happening in the mansion. Carrie Louise is pleased to welcome the guest. Lewis, her third husband, controls everything in the house. In addition, some young criminals reside here. Lewis takes care of them. There are also many people in the mansion, but only a few of them are in blood relationship with Carrie Louise. Miss Marple is invited to dinner with a large family. The next night a murder happens in the house. Now she intends to stay here to figure it out.

A businessman dies while having a cup of traditional morning tea in his office. The results of the medical examination clearly indicate that he had been poisoned. Such kind of poison does not work right away, so according to the time of death the victim was poisoned at home during breakfast. The police found some rye grains in his pockets. The relatives did not love the businessman, so his death was beneficial to almost every member of this large family. The first suspect is his young wife. She is the main heiress of the fortune. The elder son recently quarreled with his father. His daughter-in-law could not stand him. The late businessman forbade his daughter to marry. And all at once, the youngest son arrives. Long time ago he broke the relationship with the father and lived in Africa with his wife. The youngest son says his father sent an unexpected letter with the intention of making peace.

Miss Marple is a fragile and a kind woman with a very sharp mind. When her friend Mrs Elspeth McGillicuddy came to her and told her a terrifying story, they had to call the police. Elspeth was travelling by train and when she suddenly woke up at midnight, she unexpectedly saw a horrible scene – a man was strangling a woman in the train that was passing by. Witnesses started to call for help, but a conductor didn't believe her and just thought that crazy woman had a nightmare. Nobody really believed in this story at the police either, because there are weren't any reports about a the crime at the train. As soon as Mrs McGillicuddy finished her story, Miss Marple had already had some ideas about this crime. And while Elspeth was still crying and complaining that nobody believed her, Miss Marple was already considering how the criminal got rid of the corpse.