1939 Hollywood is abuzz. Legendary producer David O. Selznick has shut down production of his new epic, Gone with the Wind, a film adaptation of Margaret Mitchell's novel. The screenplay, you see, just doesn't work. So what's an all-powerful movie mogul to do? ​While fending off the film's stars, gossip columnists and his own father-in-law, Selznick sends a car for famed screenwriter Ben Hecht and pulls formidable director Victor Fleming from the set of The Wizard of Oz. Summoning both…