Easily her most complicated plot, through to 1934.

An impossible murder. Everyone could be involved.

Hercule Poirot travels back to England on the midday flight from Le Bourget Airfield in Paris to Croydon Airport in London. He is one of eleven passengers …

 As the plane is close to landing, a wasp is spotted flying around the rear compartment before a steward finds that Giselle is dead.

Poirot, who has slept through most of the flight, dismisses the belief she died from a wasp sting. Instead, he points out a dart on the floor, which is found to have a poisoned tip: Giselle was stung in the neck with it. The question remains how she was murdered without anyone noticing. …

Death in the Clouds