The year is 1750. Tristan Hart, precociously talented student of medicine practising under the legendary Dr William Hunter. His obsession is the nature of pain and preventing it; the relationship between mind and matter and the existence of God. A product of the Age of Enlightenment, he is a rational man on a quest to cut through darkness and superstition with the brilliant blade of science. Tristan Hart, madman and deviant. His obsession is the nature of pain, and causing it. A product of an age of faeries and goblins, gnomes and shape-shifting gypsies, he is on a quest to arouse the perfect scream and slay the daemon Raw Head who torments his dark days and long nights. Troubled visionary, twisted genius, loving sadist. What is real and what imagined in Tristan Hart's brutal, beautiful, complex world?