Surprisingly, the National Trust started in Wales and Griff Rhys Jones examines how it manages its farmland and tenanted farms across the country. Beginning in Pembrokeshire with the Trust's latest bequest, Treleddyd Fawr - the most painted and photographed cottage in Wales - Griff discusses the daunting restoration work facing National Trust building surveyor Nathan Goss. Through this derelict farm worker's cottage, as well as a working farm producing potatoes sold under National Trust branding and a farm which no longer farms but instead operates as a children's adventure camp, Griff explores the variety of ways in which the Trust approaches its guardianship of farms and farmland.