Fian has been adopted by monks on the west coast of Ireland. However, the young boy's fine drawings in the sand soon take him to the Isle of Iona to work on the Book of Kells - that great treasure of the Celts - in the last days of Columba. Fian befriends the monks, and though never quite becoming one of them, he grows into their world and is caught up in their stories. One day he falls in love, and in the joy and anguish that follows, he wrestles with faith and embarks on the long journey to discover his true self.