Captain Arthur Hastings is wounded and sent home from WW1. He meets his friend John Cavendish, who offers him a stay at his (or rather his step-mother's)house, called, "Styles." Hastings accecpts and so they go there. Hastings is introduced to the other members of the household, which include Mr. Inglethorp, the new husband of Mrs. Cavendish (John's step-mother.) No one likes him, except his wife, and no one trusts him. Naturally, when Mrs. Inglethorp is murdered about a week after Hastings arrives, everyone suspects Mr. Inglethorp. Enter Hercule Poirot, the famous Belgian detective, who was recently refugeed to England from the War. This interesting case was Poirot's first in England, and it will begin his long career there...