In the midst of the Hundred Years War, with Henry IV threatened by revolts in the north and the precious English wool trade imperiled by pirates in the English Channel, Sir Jamie de Grispere, newly appointed Royal Household Knight, is secretly tasked by Royal Spymaster Sir Richard Whittington to infiltrate and inform on the rebels. Jamie soon uncovers a plot to seize the crown for the young Prince Henry. With the court a swirl of rumours and treachery, Jamie must decide who to follow: the king to whom he has pledged his allegiance, or the strong prince who knighted him. The wrong choice will cost him his life.