"The Marquise de Ganges" is a historical novella by Alexandre Dumas, set in 17th century France. The story revolves around the beautiful and cunning Marquise de Ganges, who conspires with her lover, the Baron de Cambrai, to murder her husband, the Marquis de Ganges, and seize his fortune. However, their plans go awry when the Marquis unexpectedly survives the assassination attempt and seeks revenge on his treacherous wife and her accomplice. The novella is a thrilling tale of betrayal, revenge, and justice, with intricate plot twists and vivid descriptions of the historical setting.