Demons is a free adaptation of Christopher Marlowe's Doctor Faustus, set in modern times. In Doctor Faustus a learned Doctor of Divinity sells his soul to the devil Mephostophilis for forbidden knowledge. In Demons, Dr Faustus has become Peter Proud, a Professor of Christian Values at Harvard Divinity School, and this adaptation also ads a whole new section to the play, with a new character, the hero s dead wife, and a new motive behind his quest for knowledge: the desire to resurrect her.