Poirot and Hastings are on board a ship steaming towards Alexandria, in Egypt. Poirot recovers from his usual sea-sickness to take an interest in some fellow-passengers, especially the Clappertons.
Agatha Christie's Belgian detective, Hercule Poirot lives in London with Captain Hastings. Together, they range about Europe encountering cuddle mysteries. The series has strong story lines, good production and acting, and an unmistakable flavor of the pre-war years.
Agatha Christie's Poirot - Problem at Sea Synopsis and Schedule