Kevin McCloud returns to south Devon to revisit Sue Charman and Martin Whitlock whose dream was to create a family home which feels part of the earth, using old English building techniques. They were not starting from scratch, but rebuilding two ancient run-down barns. Environmental concerns were extremely important to them, but did they manage to realise their vision of rebuilding the barns in same meticulous way they were built originally, whilst incorporating energy efficient, 21st century technology?