Prompted by the 2021 ransomware attack that shut down the Colonial Pipeline and drained gas stations across the American Southeast, this film asks a blunter question: how much oil is actually left underground, and what happens when it runs out. Engineers, geologists, and energy analysts walk through how reserves are estimated, why those numbers keep shifting as extraction technology improves, and why a single hacked pipeline was enough to expose how little slack exists in the supply chain. The film moves from drilling rigs and refineries to the debate over shale, deepwater fields, and tar sands, weighing how much untapped oil those sources really represent against the cost of getting it out. It also puts the reserve question against the push toward solar, wind, and electric transport, asking whether the shift away from oil will happen because supply forces it or because alternatives out-compete it first. The Colonial Pipeline incident bookends the film as a real-world preview of what a supply shock looks like.