1326: Queen Isabella refuses to leave France and humiliates her husband King Edward II by flaunting her adulterous relationship with the arch-traitor Sir Roger Mortimer. The King is furious when he hears she has also betrothed their son to the daughter of the French Count of Hainault, and all England fears invasion. As news of an invasion fleet is received, the King’s knights, including Sir Baldwin de Furnshill, are commanded to London to protect the King and his realm. Meanwhile Bishop Stapledon, the Treasurer of England, is under threat – but from whom? He has made many enemies and Baldwin and ex-bailiff Simon Puttock must do all they can to find the would-be assassin before it’s too late.