Young Mabel West
is the daughter of mystery writer Raymond West
, who wants her to lead a normal life. Rebelling against this, Mabel wants to be a great detective, and sets out for London to become assistant to none other than Hercule Poirot
, the great Belgian detective who resides there. She finally wins the reluctant approval of her father, and embarks on an exciting life of mystery and suspense - his only demand being that she occasionally spend some time with her great-aunt, Jane Marple
, in the small village of St. Mary Mead.
Maybelle West is a young relative of the famous Miss Marple, and an aspiring detective in her own right. Although the privilege of getting to witness Miss Marple's work from up close ought to be enough to train anyone in the craft, Maybelle also secures herself a place under the tutelage of another detective genius, Hercule Poirot
. Thus, she ends up traveling between the village of St. Mary Mead and London, observing the two great minds at work as they use their amazing powers of deduction to solve crimes that leave the regular police baffled.