Anna Wintour, the legendary editor-in-chief of Vogue magazine for twenty years, is the most powerful and polarising figure in fashion. Hidden behind her trademark bob and sunglasses, she has never allowed anyone to scrutinise the inner workings of her magazine. Until now. With unprecedented access, filmmaker R.J. Cutler's new film The September Issue does for fashion what he did for politics in The War Room, taking the viewer inside a world they only think they know.