The year is 1808: France is a powerful empire ruled by Napoleon. Outside of Paris, in the mental asylum of Charenton, the Marquis de Sade has been inprisoned for seven years because of his outrageous writings ... Tonight, Sade presents a play, performed by the institution's patients, dramatyixing the assassination revolutionary leader Jean-Paul Marat during the French Revolution.   He is glad to have you with us.