After years of fighting in the desert sun - and secretly working for peace with the Brethren - Will Campbell returns to find his Scottish homeland under attack by his enemy, King Edward I.

Betrayed by those he has served since boyhood, torn apart watching his daughter plunge into a dangerous affair, Will must now forge his own path to peace - even if it leads through another battlefield.

But a new threat is rising in France, where a warrior king will stop at nothing to achieve his twisted ambitions.

The fight for the Holy Land is over, but the Temple's last battle has just begun...