On a luxurious cruise down the Nile, opulence becomes the setting for a mysterious murder. The plot revolves around the billionaire Linnet Ridgeway, who, after marrying the charming Simon Doyle, finds herself surrounded by a group of friends and acquaintances who, while appearing to enjoy a festive atmosphere, hide dark secrets and resentments from the past. The atmosphere turns tense when Linnet is found murdered in her cabin, unleashing chaos among the travelers.