The Little Prince is, after the Bible, the second best-selling book in history. Seventy years after its first publication, what legacy has The Little Prince left and what influence does the book, which is translated into more than 250 languages and distributed in more than 140 million copies, still carry on readers all over the world? In the form of a fable, the famous plot of the book distils an ethics of self-acceptance and invites respect for humanity … for a better world. Did we learn something from this story … or did we all become adults? And what “invisible essence” illuminates this fable that continues to captivate millions of readers decades after being offered to humanity? These are the questions that are at the heart of this documentary tribute that explores the mystery at the heart of one of the most beautiful stories ever written, and the complex genius that was its author, Antoine de Saint-Exupéry.