Famous ethnologist and astronomer Chantal Jègues-Wolkiewiez, brings up a theory that could completely disrupt our conceptions on the origins of arts and sciences. 17 000 years ago, Cro-Magnon men already observed the complicated moves of the sun, the moon and the main constellations. In between an investigation and a stellar tale, this film is a dive in time immemorial. It recounts the birth of a new science, on the crossroad of two fields: astronomy and prehistory.