Danger and dissent stalk the streets and taverns of Elizabethan England. The Queen's chief spymaster, Francis Walsingham, and his team of agents must maintain the highest levels of vigilance to ward off Catholic plots and the ever-present threat of invasion. One operative in particular - a young Cambridge undergraduate of humble origins, controversial beliefs and literary genius who goes by the name of Kit Marlowe - is relentless in his pursuit of intelligence for the Crown. When he is killed outside an inn in Deptford, his mysterious death becomes the subject of rumours and suspicion that are never satisfactorily resolved. Years later, Thomas Phelippes, a former colleague of Marlowe's and a man once much valued by Walsingham, finds himself imprisoned in the Tower. When he is visited by an emissary of the new king, however, it becomes clear that his long fall from favour may be reversed if he will furnish his monarch with every detail he is able to recall about his...