The early church saw a proliferation of writings all claiming divine authority. Original manuscripts and critical commentary are used to explore the infancy gospels, St. Clement's letters to the Corinthians, and the Gnostic gospels, including the Gospels of Thomas, Mary Magdalene, and Philip.

Other key figures and events are portrayed, including Marcion, Tertullian, the Emperor Constantine, the Council of Nicea and St. Athanasius, who first codified the 27 books of the New Testament.