Long before the arrival of Homo sapiens or even Neanderthals, other humans inhabited French territory during intense periods of glaciation. One place in particular has witnessed their passage: the Tautavel cave in France, at the foot of the Pyrenees mountain range. How did these ancient humans survive in such a harsh environment? Based on the latest scientific discoveries, the film changes the way we look at these distant ancestors, whose cognitive abilities never cease to amaze us.