The death of the young maid of honor Claudine de Chabrol did not make any impression on the inhabitants of the royal palace. The blond beauty had been ill for a long time, and lately she had been getting worse. However, the court physician Fresson is sure that the woman was poisoned. Alarmed by this, and even more by the danger of a possible scandal, Duchess Eulalia, who manages the female half of the palace, turns to Baron de Segur for help. She asks him to investigate the death of the maid of honor, while maintaining sensitivity. Having begun to fulfill her request, Mark learns that shortly before Claudine’s death, her father, with whom she had not maintained a relationship for a long time, also died under similar circumstances. Are their deaths connected, and, if so, to whom did these two inflict such a grave offense that the retribution for it turned out to be so cruel?