While vacationing in the Caribbean, Miss Marple must identify a murderer after a fellow guest at her hotel dies under suspicious circumstances. Seeking a quiet retreat, the elderly protagonist finds her relaxation interrupted by the sudden death of Major Palgrave, a man who had just begun to recount a story about a serial killer. Miss Marple must navigate the social dynamics of the resort and the reticence of the other guests to uncover the truth. The narrative unfolds through a third-person perspective that emphasizes Miss Marple's keen observation of human nature and her ability to connect seemingly unrelated details.

This novel is widely regarded as a quintessential example of the later works in the Miss Marple series. Readers often note the effectiveness of the tropical setting in providing a fresh backdrop for the familiar detective's analytical approach. The mystery is frequently praised for its intricate plotting and the clever misdirection employed by the author. It remains a staple for those who appreciate traditional detective fiction that prioritizes character observation over high-octane action.