It is the year 597 and Pope Gregory is sending a select number of his monks, led by Fr. Augustine, to re-evangelize England. Young Wolf, born in that land but raised in Rome, accompanies his father, Wolfstan, who goes as a guide and interpreter. Though the King of Kent's wife is a Christian, the missionaries from Rome do not know whether they will be welcomed, tolerated or martyred. In a story full of adventure, Wolf meets Fritha, a Saxon girl whose life and destiny are soon closely bound up with his own.

Events, significant in the history of Christianity, are vividly brought to life by this veteran writer of historical fiction.