A woman is killed by a poisoned dart in the enclosed confines of a commercial passenger plane From seat No 9 Hercule Poirot was ideally placed to observe his fellow air passengers Over to his right sat a pretty young woman clearly infatuated with the man opposite; ahead in seat No 13 sat a Countess with a poorly-concealed cocaine habit; across the gangway in seat No 8 a detective writer was being troubled by an aggressive wasp What Poirot did not yet realize was that behind him in seat No 2 sat the slumped lifeless body of a woman