The thinker François Noudelmann reveals some details, not of the myth, but of the man. The book reveals all the contradictions of one of the greatest French intellectuals.

The portrait has been spun based on unpublished documents provided by Arlette Elkaïm, adopted daughter of the author of La Nausea. The author, who "knows all his work very well, reveals to us a Sartre who can only be understood in the constant tension between the obligation he imposed on himself as a public figure"