Death in the Clouds

From seat No.9 Hercule Poirot could observe his fellow air passengers. Over to his right sat a pretty young woman 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