An unnamed narrator, who is later revealed to be Ned Willard, describes the execution of a man in front of Kingsbridge Cathedral. The condemned man, a bomber, is brought forward by the sheriff and surrounded by a jeering crowd. Ned reflects on the weight of his responsibility, for he has spent his life hunting such criminals in order to protect his country. He also professes his staunch support for religious tolerance, asserting that individuals have the right to choose their beliefs about God.

In 1558, Ned Willard returns to Kingsbridge, hoping to see his love, Margery. However, her brother, Rollo, tells Ned that Margery is now engaged to Bart Shiring, a man she does not love. Margery resents her parents' decision and rebels against the arranged marriage. Her family is driven by a desire for social standing, and her father insists on the wedding and physically punishes her for her disobedience. At a feast, political tensions rise surrounding the question of Queen Mary Tudor’s succession and Princess Elizabeth's potential ascension as a Protestant ruler. Ned also learns of a French attack on Calais that threatens his family's fortune. He is offered a position with Princess Elizabeth, but this plan is thwarted by his mother, who insists that he look after his family’s interests.