Andrew Rossi, the director of the illuminating Page One: Inside the New York Times, gains access to another celebrated Manhattan institution with his latest documentary. The film is an account of the run-up to the Metropolitan Museum of Art Costume Institute’s annual spring exhibition and the frock-and-awe red carpet Met Gala fundraiser. The year in question is 2015 and the exhibition is the most ambitious to date: China: Through the Looking Glass. Key characters include curator Andrew Bolton and adviser Wong Kar Wai, but the most compelling presence is Vogue editor Anna Wintour. “Andrew is a real visionary,” she purrs. “Our job is help him execute his creative genius.” Rossi later shows Bolton’s creative genius systematically deflated by a few icy darts of Wintour’s disapproval.