North America's bedrock holds a 4-billion-year record, starting with the Acasta Gneiss in the Canadian Shield, some of the oldest exposed rock on Earth. This film traces how the continent was built piece by piece: ancient cratons welding together, mountain ranges rising and eroding away, inland seas advancing and retreating, and volcanic provinces leaving their mark from the Pacific Northwest to the Appalachians. It covers the plate tectonic collisions that assembled the landmass, the ice ages that carved its lakes and valleys, and the geological forces still active today, from the San Andreas Fault to Yellowstone's supervolcano. The film also looks forward, laying out the evidence geologists use to predict how the continent will keep moving and eventually collide with other landmasses to form a future supercontinent. Expository narration carries the science, paired with maps, animations, and location footage that show why North America's rock record is unusually complete compared to other continents.