The infamous affair of the Diamond Necklace threatens to destabilize the French monarchy and accelerate the descent toward revolution. Jean Plaidy explores the intricate web of deception surrounding the theft of a priceless piece of jewelry, focusing on the gullibility of a royal prince and the machinations of an ambitious woman. The narrative examines the political instability of the court of Louis XVI and Marie Antoinette, utilizing a third-person perspective to navigate the complex social hierarchies of 18th-century France. The protagonist must contend with secret instigators and the shifting loyalties of a crumbling regime, where every action carries the weight of impending national collapse.

This work is characterized by the author's signature approach to dramatizing well-known historical scandals through a focus on character motivation and court intrigue. The narrative structure suggests a methodical reconstruction of the events surrounding the Diamond Necklace, prioritizing the political climate of the era over pure suspense. Readers likely encounter a dense, research-heavy style that aims to provide a plausible solution to a long-standing historical enigma. The text serves as a window into the final years of the French monarchy, emphasizing the fragility of power when confronted with calculated deception.