Around 10,000 BC, the planet swung through violent climate change, tipping into a minor ice age that reshaped ecosystems across the globe. The film traces how this sudden cooling pushed mega-fauna such as mammoths and giant sloths toward extinction, and how early human populations had to adapt or perish alongside them. Drawing on paleoclimate evidence and the fossil record, it reconstructs a world where familiar landscapes turned hostile within a few human generations, forcing migration, new hunting strategies, and the collapse of species that had thrived for millennia. The film treats this ancient upheaval as a case study in how fragile the balance between climate and life can be, using the extinction of Ice Age giants as the clearest evidence of how fast an ecosystem can unravel. It is a look at a world-ending event long before written history, told through the animals and environments it erased.