Good versus Evil

The primary plot throughout the entire novel is that of good versus evil. Hercule Poirot has an internal struggle with good versus evil and so do each of the characters that are involved in the story as the murder plot unfolds. Poirot's first encounter with good versus evil is when he has a conversation with Jacqueline de Bellefort to try to convince her to stop following Linnet and Simon Doyle around.

Each of the characters struggles with the good and evil of the other characters they encounter while sailing up the Nile on the Karnak. While each characters has their own personality traits and characteristics, the other characters start to evaluate what the motive of each one would be to kill someone, and even if the person has it in them to be a murderer. As the bodies start piling up on the ship, evil seems...