The Whithorn Way follows an ancient pilgrim route from Glasgow to Whithorn in Dumfries and Galloway. In this final episode, Mark and Rachel walk some of the Ayrshire Coastal Path south of Girvan. Then Mark takes to his bike for the final section to Whithorn. They reach Whithorn Priory where the relics of St Ninian were kept, and the place where pilgrims would seek atonement. Their final destination is the beach next to St Ninian's cave where he is said to have spent a considerable amount of time in the darkness praying.