L'un ne va pas sans l'autre is a film of dance-movement about the quest of ascension on the top of La Montagne d Argent of a soloist and his duplication (2 duets). Inspired by Buto, the soloist is an entity who embodied the union between the anima and the animus of a woman or a man. He is the symbol of the loneliness that fills a unique being. The human being is born, and, he takes conscious of the exterior world that is nothing else that himself. His introspection takes him back to his birth: the water. But he is older; he took conscious of his loneliness witch became, his sovereignty.