A woman's idyllic summer vacation unravels as she becomes entangled in a web of deceit and potential murder. Margaret Millar's "Rose's Last Summer" plunges readers into the seemingly tranquil setting of a Mexican resort where Rose, a woman seeking solace and escape, finds herself drawn into the mysterious circumstances surrounding a death. As Rose investigates, she uncovers hidden secrets and dangerous motives among the other guests, forcing her to confront the dark undercurrents beneath the surface of paradise. The narrative unfolds with a growing sense of unease, as Rose must navigate treacherous social dynamics and her own growing suspicions to uncover the truth before she becomes the next victim.

Margaret Millar's "Rose's Last Summer" is often cited as a prime example of her skill in crafting atmospheric mysteries with psychological depth. Critics have noted her ability to create a palpable sense of place and to populate her stories with complex, often morally ambiguous characters. The novel is recognized for its intricate plotting and its exploration of the darker facets of human relationships, set against a backdrop that initially appears idyllic. The pacing is deliberate, allowing for a thorough development of suspense and character, leading to a satisfying and often surprising resolution.