As a result of his journeys, Jack has learned how to build a cathedral filled with light. Waleran offers Philip a new position. Kingsbridge becomes prosperous again, which infuriates William, who plans an attack.

Set in 12th-century England, this series based on Ken Follett's novel begins when an unlikely member of King Henry's family assumes the throne. A fire destroys Kingsbridge church, giving mason Tom the chance to build a magnificent new cathedral. The bishop has other ideas, and a long-hidden secret is revealed. Actor Gordon Pinsent portrays the Archbishop of Canterbury and Donald Sutherland is Earl Bartholomew.