This episode follows a couple attempting to build a high-tech kit eco-home in a spectacular corner of the Scottish Borders. Bill and Sukie Barber are lifelong nature lovers and live on a six-acre smallholding in the picturesque Scottish Borders. The couple have regular visitors from around the globe, along with their eight, grown-up children and four grandchildren. With their croft bursting at the seams, they have decided to build a new house in one of their fields, using primarily locally sourced materials to fit with their sustainable lifestyle: an ambitious remit in such a secluded corner of the Borders. To attempt to achieve their goal, the couple have plumped for a kit home, built using timber from nearby forests. But turning their low-carbon-footprint plans into a reality proves harder than expected, while weather delays and mismatching foundations threaten to wreak havoc with the build schedule.