Set in 1916, we meet Captain Hastings as he is invalided out of the Great War and goes to convalesce at Styles Court, the family home of his great friend, John Cavendish.
By an extraordinary coincidence, billeted in the village is a brilliant little retired detective with an egg-shaped head, who made a considerable impression on the Captain when he was in Belgium.Styles is not a happy household and in the blistering summer heat, tensions mount.
Even so, the tragic murder which occurs is not expected.
The entire family is drawn into the case, but with their reluctant permission hastings calls upon the services of the diminutive belgian.
Thus begins one of the great partnerships and friendships in the history of crime.
In the blistering summer heat, tensions are mounting at Styles Court.
It will not be long before Captain Hastings has to call upon the services of Hercule Poirot
Emily Inglethorp has suddenly died, apparently of strychnine poisoning.
Captain Hastings has asked Hercule Poirot to look into the case and there's a visit from Detective Inspector Japp of Scotland Yard.
Hercule Poirot, Captain Hastings and Detective Inspector Japp have become heavily involved with the case, but everyone in the household has an alibi for the time of the murder.
Captain Hastings and Detective Inspector Japp are bewildered by the antics of Hercule Poirot as he rushes back to Styles Court in a state of great excitement.