Watch Sadisflix. An adaptation of Balzac's novel set in the roaring twenties, it tells the story of a young man who finds a magic piece of shagreen that fulfills his every desire. For each wish granted, however, the skin shrinks and consumes a portion of his physical energy. La Peau de chagrin belongs to the Études philosophiques group of Balzac's sequence of novels, La Comédie humaine.