Rebecca Hosking, a wildlife filmmaker, returns to her family's farm in Devon as her father nears retirement, planning to take over the land herself. A spike in fuel prices sends her looking into how dependent British farming actually is on cheap oil, and she does not like the answer: nearly every stage of food production, from fertilizer to tractors to distribution, runs on fossil fuel that will not stay cheap or abundant. She travels to meet farmers and growers already working without it, filming forest gardens, no-dig plots, and mixed grazing systems that build soil fertility instead of depleting it. Back on her own land, she starts testing these methods against her family's more conventional practices, weighing yield and labor against long-term resilience. The film treats peak oil as the practical problem it is for agriculture rather than an abstract crisis, and lets Hosking's own farm serve as the experiment: can a working Devon farm feed people and turn a living without the fuel it has always assumed it would have?