On the luxurious steamboat “Carnac,” sailing along the Nile, a young millionaire is murdered—recently married and, as it turns out, having many enemies among the passengers. Anyone could have killed the self-assured and rude girl who stole the bridegroom from her best friend. But none of the likely suspects committed the crime… Fortunately, a great detective is on board: Hercule Poirot, who knows the entire society represented on the cruise—back in London, and is aware of the possible motives of each person present. And, of course, the first thing the Belgian thinks about is the “love triangle” involving the murdered woman, her newlywed husband, and a very temperamental woman whom he left in favor of the millionaire…