Hercule Poirot must identify a killer hidden among a group of archeologists when the wife of a lead researcher is found dead at a remote excavation site in Iraq. While visiting the Middle East, the Belgian detective is pulled into a tense social environment where the victim, Louise Leidner, had been living in fear of an unknown assailant. Poirot navigates the claustrophobic atmosphere of the dig house, where professional rivalries and personal secrets complicate the investigation. The narrative unfolds through a combination of traditional detective observation and the testimony of those present at the site, forcing Poirot to parse truth from calculated deception.

This novel is widely regarded as a quintessential example of the golden age detective story, praised for its atmospheric setting and intricate puzzle construction. Readers often highlight the effectiveness of the desert location in heightening the sense of isolation and tension among the characters. The inclusion of a nurse as the narrator provides a grounded perspective that contrasts well with Poirot's detached, analytical approach to the crime. The resolution is frequently cited for its clever subversion of typical mystery tropes, cementing its status as a staple of the genre.