As the year 1326 draws to a close, London is in flames. King Edward II is a prisoner, and the forces of his vengeful queen, Isabella, and her lover Sir Roger Mortimer, are in the ascendant. The Bardi family, bankers who have funded the King, must look to their future with the Queen, steering a careful course between rival factions - if, that is, they can keep themselves alive.

Others, too, find their loyalties torn. Guarding the deposed King on behalf of Mortimer, Sir Baldwin de Furnshill and bailiff Simon Puttock find themselves entangled in a tightening net of conspiracy, greed, betrayal and murder.