Poirot receives clues and taunting letters from a serial killer who appears to choose his random victims and crime scenes alphabetically.

While Poirot sleeps on an airplane flight from Paris to London, a notorious French moneylender is murdered with a poisoned dart.    

Shortly after opening an ancient Egyptian tomb, members of an English-American museum expedition start dropping off like flies. Can it truly be the Pharaoh's curse? Poirot travels to Egypt to unravel the mystery.

Poirot investigates when the cruel CEO of a chemical company is bludgeoned to death in his home after the company's formula for a revolutionary new synthetic rubber is targeted by a thief.