Ifor visits trees and mountains as a way of understanding the journey Britain undertook from the old Pagan religion to Christianity. His journey starts in Glastonbury, site of the famous tor and the Thorns, the most holy trees in the country. He discovers how even now these symbols are causing friction and discord. His journey continues at Knowlton in Dorset, a place where a Norman church has been built right in the centre of an earthen henge. There he meets a druid who explains how Pagan sites were often overwritten in this way by the new Christian religion before they both discover that, at least here, earth magic seems to be making a comeback. Ifor visits a bleeding yew tree that has divided opinion for 600 years, and in Snowdonia a mountain where the devil is said to have gone toe to toe with an early Christian missionary.