The final Tommy & Tuppence novel in which a poisoning many years ago may not have been accidental after all! Tommy & Tuppence Beresford have just become the proud owners of an old house in an English village. Along with the property they have inherited some worthless bric-a-brac including a collection of antique books. While rustling through a copy of The Black Arrow Tuppence comes upon a series of apparently random underlinings. However when she writes down the letters they spell out a very disturbing message: M a r y -- J o r d a n -- d i d -- n o t -- d i e -- n a t u r a l l y!