At the time of Arn's birth, the kingdom is in revolt; he is sent to live in a monastery, where he learns to use his intellect as well as his sword.

The world outside the safe walls of the monastery turns out to be not only foreign to Arn, but also dangerous.

The young lovers are caught in the conflict between the church and the secular forces; they are forbidden from being together and must struggle to survive.

In the Holy Land, Arn has a reputation as a great military leader and a man who keeps his word; even the Muslims fear and respect him after an incredible victory.

It is 20 years since Arn was sent to war and Cecilia to a convent; Arn prepares for one last battle in the Holy Land, and Cecilia adapts to life outside the convent.