The film is about wildlife filmmaker Rebecca Hosking's investigation into how to operate her family's farm in the UK without using fossil fuels.
She attends a soil conference, she talks to a guy from the Post Carbon Institute, she visits permaculturalists and forest gardeners and other farmers who are making the change from big tractors and monocultural crops to gardens teeming with life and biodiversity.
I recently read that the UK is undergoing a gardening revolution, which makes complete sense. Because if this is your average modern industrial farm, of course more and more people are going to opt to grow plots of food for themselves and their families in their backyards. Monocultural paddocks such as this are completely oil dependent and therefore completely obsolete as a future model.