Sharing the Holy Light tells the story of Paulus, a former guard of the Apostle Paul, and of Paulus' sister Livia. As a new "Christ follower", Paulus struggles to find answers about his new faith and the God he now claims to serve. His search for answers takes him to Ephesus, where he meets the Apostle John. In this encounter, he learns many of the stories of Jesus and His life on earth. Livia and her husband Tatius have settled in Arelate (Arles), in Southern Gaul, and have begun a successful Christian ministry to the people of that region.
Sharing the Holy Light is set during the time just before the death of Emperor Nero and in the tumultuous years that follow. It is a time of unrest and violence, and, as "Christ followers", the book's characters are caught in the web of uncertainty that engulfs the entire Roman Empire.