A dinner guest compares the labours of Poirot to those of his mythological counterpart, Hercules, the Greek hero. The great detective is not amused. Poirot has already decided to retire, but first he will take on twelve monumental cases in the contemporary world that correspond to the twelve labours of Hercules, as a suitable farewell.
In the final short story, Hercule Poirot once again meets the love of his life, Countess Rossakoff.
Contains the following stories: The Nemean Lion, The Lernean Hydra, The Arcadian Deer, The Erymanthian Boar, The Augean Stables, The Stymphalean Birds, The Cretan Bull, The Horses of Diomedes, The Girdle of Hyppolita, The Flock of Geryon, The Apples of Hesperides, The Capture of Cerberus.