A wealthy industrialist is found dead in his study. Is his death related to a discovery made at his chemical factory? And is his wife all she seems?

Friends and family gather at a dinner party to mark the second anniversary of a woman's death. Meanwhile, Poirot is caught up in a coup d'etat and arrested as a spy, which prevents him from solving a murder at a French restaurant owned by an Italian in Buenos Aires.

Poirot has to execute the final wishes of an old friend who has been killed.

Poirot is drawn into the underworld of London's Little Italy when Captain Hastings looks for a new car, but instead finds murder.

Poirot returns to Belgium for the first time since the Great War. There he revisits a twenty-year-old murder mystery that was never officially solved.

When Poirot investigates the mysterious death of a despised art dealer, he finds that he has more than enough suspects from whom to choose.

Mrs. Opalsen's famous pearls are stolen and Poirot is happily on hand to investigate. A complex theft calls for a sophisticated solution. Unfortunately, Poirot is hindered everywhere he goes by being mistaken for 'Lucky Len'.