Energy powers every civilization that has ever existed, and this film traces where it comes from and what happens when a society runs low on it. It moves from the muscle and firewood that ran ancient economies through coal and the steam engine, into oil, electricity, and the nuclear and renewable sources competing to replace them. Historians and scientists explain how each transition reshaped where people lived, how wars were fought, and how wealth was distributed, treating the industrial revolution as an energy story as much as a technological one. The film also asks the harder question sitting underneath the history: whether growth built on cheap fossil fuel can keep going, and what a civilization looks like when the energy that sustains it runs short. It uses archival images, diagrams of energy systems, and expert interviews to keep the physics grounded, never straying far from the practical question of what powers a lightbulb, a factory, or a city, and what happens when that supply falters.