A chance discovery of a dying man at the base of a cliff propels an amateur sleuth into a dangerous investigation sparked by a cryptic final question. Bobby Jones, a local man, finds himself entangled in a complex web of deceit after hearing the victim's last words, "Why didn't they ask Evans?" Alongside his spirited friend Frankie Derwent, Bobby navigates a series of perilous encounters and social deceptions to uncover the truth behind the man's demise. The narrative unfolds through a classic mystery framework, balancing lighthearted banter with high-stakes tension as the duo confronts adversaries who will stop at nothing to keep their secrets buried.

This novel is frequently cited as a standout example of Christie's ability to blend lighthearted adventure with intricate puzzle-solving. Readers often highlight the chemistry between the two protagonists as a refreshing departure from the more somber tone of her Herculean or Marple-centric works. The mystery itself is noted for its clever misdirection and the satisfyingly complex nature of the central question. While it may lack the iconic status of her most famous detectives, the book remains a staple for those seeking a well-crafted, standalone mystery that balances wit with suspense. The narrative structure effectively maintains engagement through a series of escalating threats that keep the stakes high until the final revelation.