The blockbuster appeals to a very wide audience, from 7 to 77 years and from Paris to Beijing. These films, which have boosted the film industry, started out with "Jaws" and "Star Wars" and are still prospering with Avatar or Alice in Wonderland. To succeed, the films must meet a few precise criteria, one of them being their cost - at 100 million dollars minimum. But in Hollywood, the films' ingredients are a well-kept secret; perhaps for fear of discovering that the studios' house rules are not as rosy as in certain fruitful happy endings? The pressure and the stakes are colossal. This fascinating documentary reviews the numerous professions affiliated with the blockbuster, via interviews with producers of the major studios (Walt Disney Studio, 20th Century Fox...), screenwriters, actors' agents and those in charge of the trailers, a crucial stage for the film's success.