A mysterious book of prophecies, written by a sixth century Irish monk, has puzzled scholars through the ages. Foretelling wars, plagues and rebellions, the Black Book of Bran is said to have predicted the Black Death and the Gunpowder Plot. But is it the result of divine inspiration or the ravings of a madman? A hidden hoard of Saxon gold. A poisoned priest. A monk skinned alive in Westminster Abbey. Only one thing is certain: whoever comes into possession of the cursed book meets a gruesome and untimely end...