Soil, according to this film, is alive: a teaspoon of it holds more organisms than there are people on Earth, and nearly everything humans eat, build, and burn depends on a few inches of it. Directors Bill Benenson and Gene Rosow gather scientists, farmers, and activists from several continents to trace what happens when that layer erodes, compacts, or gets poisoned, from Dust Bowl-era failures to present-day industrial farming. Narrator Jamie Lee Curtis frames the story with a blunt historical claim: "when humans arrived two million years ago, everything changed for dirt," and the fate of the two has been tangled together ever since. The film moves between lab shots of root systems and microbial life, and field footage of degraded farmland and reclamation projects, letting soil scientists explain in plain terms why topsoil loss drives food shortages, flooding, and climate instability. It closes on restoration efforts already underway, treating soil health as a fixable problem rather than an abstract crisis, and asking what it would take to farm and build with the ground instead of against it.