Kevin McCloud travels to south Devon to meet Sue Charman and Martin Whitlock whose dream is to create a family home which feels part of the earth, using old English building techniques. They are not starting from scratch, but rebuilding two ancient run-down barns. Environmental concerns are extremely important to them, but will 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?