Arthur Hastings who is convalescing from his injuries that he has incurred during the great war, is invited by an old friend to stay with him at Styles, Essex. Styles is ruled by the old but kind Mrs Inglethorp who has recently married a young guile man called Alfred Inglethorp. Soon Hastings discovers that Styles is filled with Conjugal and financial problems.
One fateful night Mrs Inglethorp is taken seriously ill, her body goes through violent convulsions and she dies. later, a doctor confirms that the old woman had been poisoned through strychnine. Hastings suggests to the remaining family members to call in a detective. A detective who is an old friend of Hasting and would investigate the matter discreetly, A detective who is a Belgian, A detective whose green eyes light up when he has an idea and is living in the village because wherever he goes murder follows. can you take a guess who?
