Carla Crale, convinced her mother is innocent of the murder of her father, a crime for which the woman was sentenced to life in prison, challenges brilliant Belgian sleuth Hercule Poirot to clear her mother's name by returning to the scene of the crime.

Inspector Hercule Poirot, having retired to the small English village of King's Abbot, is drawn into the investigation of the murders of the widow Mrs. Ferrars and her suitor, local squire Roger Ackroyd.

Miss Marple helps a young couple solve a murder that had occurred eighteen years earlier.

Poirot vacations at the picturesque Jolly Roger Hotel, situated on an island, and finds that at least one of the guests is a cunning murderer.

Miss Jane Marple investigates a series of poison pen letters accusing many citizens of the quiet village of Lymstock of illicit love affairs and scandals leading to at least one distraught victim to take her own life.

While detective Hercule Poirot is flying over Paris, one of the other passengers is murdered, and with only twelve people on the plane, he thinks it should be easy to find the killer, but each of the passengers seems to have the means and motive to kill the victim.