The tone turns grim with the poisoner Derues and the cold-blooded schemes of La Constantin. Both stories expose the calculating minds of criminals hiding in plain sight. Deception, forged documents, and greed lead to grotesque ends. In “Joan of Naples,” a queen’s reign is marred by scandal, ambition, and multiple mysterious deaths. Dumas delves into dynastic chaos and the burden of female power in a ruthless world. The stories unravel layer by layer, revealing moral collapse behind regal appearances. This section echoes with quiet dread. Evil often smiles behind a velvet mask.