Maybelle West is an ordinary young girl, with a cute pet duck. She is the daughter of a very busy man. Like all girls her age, she wishes to break away from home, and make her own decisions. Her great-aunt, Jane is a very experienced old lady, who is well known by many of her quick mind and her deductive capabilities, and is often called by people to solve mysteries often involving some sort of criminal activity. Inspired by Aunt Jane, Maybelle's greatest ambition is to become a detective someday. One fated night at the Grand Metropolitan Hotel, she encounters a short, round, balding man with an egg shaped head and an impressive mustache, and an even more impressive ego. One of the guests is robbed of her priced possession, a pearl necklace, and this man, a famous private detective, solves the case and reveals the culprits. After asking her father's permission, Maybelle becomes the detective's assistant, and her life is about to change.
Based on the works of Agatha Christie, the anime Poirot and Marple is a unique approach on the adventures of the two detectives. It follows the life of Miss Marple's grandniece, Maybelle, who becomes the assistant of the famous Hercule Poirot. Usually following Poirot and Hastings on their investigations, Maybelle sometimes returns to her great-aunt's house whenever she takes a break, having the opportunity to see both detectives at work, and sometimes actively taking part in their investigations, even putting her own life on the line on one occasion. While she does have her moments sometimes, mostly she could come off as a mary sue to people watching the show with critical eyes.
The anime itself consists of short arcs of 2-4 episodes, each focusing on one of Poirot's cases, with occasional one shots featuring either him, or Miss Marple, who herself gets two major arcs in the second half of the series.
Poirot and Marple is a good anime. It's no means great. It's may interest people who are fans of Agatha Christie. I would also warn these people not to expect anything special. It may sound discouraging, but better to expect less than be disappointed in the end.