From his seat, Poirot was ideally placed to observe his fellow air passengers. To his right sat a pretty young woman; ahead, a Countess with a cocaine habit; an... » 

From his seat, Poirot was ideally placed to observe his fellow air passengers. To his right sat a pretty young woman; ahead, a Countess with a cocaine habit; and across the gangway, a detective writer. What Poirot didn't realize was that in the seat behind was the lifeless body of a woman. «