The infamous writer, the Marquis de Sade of 18th Century France, is imprisoned at Charenton Insane Asylum for unmentionable activities. He manages to befriend the young Abbé de Coulmier, who runs the asylum, along with a beautiful laundress named Madeline. Things go terribly wrong when the Abbe finds out that the Marquis' books are being secretly published. The emperor Napoleon contemplates sending Dr. Royer-Collard to oversee the asylum, a man famed for his torturous punishments. It could mean the end of Charenton and possibly the Marquis himself.