1666. London is recovering from the Great Plague which has now slithered out of the City to breed elsewhere. The village of Shyam responds to the pestilence by closing its borders, allowing no one to leave until the disease has run its course. But this is where Harry Lytle and his reluctant colleague, David Dowling, are ordered to go; to track down a traitor and bring him out alive. Refusing Lord Arlington's demands is not an option and following their every move is a merciless killer. The road to Shyam is long and dangerous, and the story that awaits them will turn their world upside down . . .