It tells the story of two scientists who decided to leave for the great north, to film northern lights in 3D. Jean Mouette works at the Institute of Astrophysics in Paris and has been hunting the deep space for years photographing galaxies and solar eclipses in the four corners of the planet. Thierry Légault is an astrophotographer renowned throughout the world that NASA and the secret services are snatching. We will follow them several weeks in this great north off the polar circle far over the 69th parallel. We will live by their side by -25 ° in the pure and deep black of a night that lasts more than 20 hours isolated from the world by hundreds of kilometers of ice and snow. You will discover the scientific facts as well as the myths and legends of these lights that dance in the night, the mysterious Aurora Boréalis.