For decades, the Clovis people were taught as the first Americans, crossing a land bridge from Siberia around 13,000 years ago. This film follows the archaeologists and geneticists picking that timeline apart, from the Solutrean hypothesis that ties Ice Age European toolmakers to sites on the Eastern seaboard, to excavations at Monte Verde in Chile that predate Clovis by over a thousand years. Researchers walk through stone tool comparisons, DNA studies, and coastal migration routes that would have let people move by boat along a Pacific "kelp highway" long before an inland corridor opened through the ice sheets. Interviews with the scientists behind these competing theories lay out what the evidence can and cannot prove, including the controversy over skeletal remains like Kennewick Man and what they reveal about ancestry. The film treats the question as genuinely open, showing how a single well-dated hearth or spear point can upend a theory that stood for seventy years, and leaves the peopling of the Americas as a live argument rather than a settled textbook fact.