Both a scientist and an intrepid explorer, Jean-Baptiste Charcot laid the foundations of research in the polar regions. At the dawn of the 20th century, on his laboratory ship, the "Pourquoi Pas?" , he led science into unknown territories. His discoveries continue to benefit research and fuel the study of current climate upheavals. From his first expeditions to Antarctica to his tragic end in the Arctic seas, the film traces the remarkable destiny of this discreet hero.