1325: Sir Baldwin de Furnshill and his friend Simon Puttock are sent to France to guard the King's son. The King's son must pay homage to the French King if he is to enable the English to keep hold of vital territory, but they are unaware that King Edward's wife, Isabella, has grown so disaffected that she has begun to plot her revenge. It isn't long before Simon and Baldwin discover that the future of the English crown is at risk. In their most perilous mission yet, the pair's loyalty is tested to its limits as they encounter a deadly assassination plot that will alter the course of history . . .