1792: the blood begins to drip from the guillotine. The French Revolution is entering its most violent phase, and threatens all Europe with chaos. In the age of the mob, no individual is safe. The spies of England, France and Prussia are fighting their own war for survival and supremacy. Somewhere in Paris is a hidden trove of secrets that will reveal the treacheries of a whole continent. At the height of the madness a stranger arrives in Paris, to meet a man who has disappeared. Unknown and untrusted, he finds himself the centre of all conspiracy. When the world is changing forever, what must one man become to survive?