Julia Roberts had no doubt. When she played Erin Brockovich in the film of the same name, it was as a bold and brassy single mum who, as the pitch went, "brought a corporation to its knees and a town to its feet". Julia got an Oscar; Erin became famous as the sassy street fighter who uncovered one of America's worst cancer scandals. Now Erin's at it again, with a new case, a class action, set in the heart of Tinseltown. It has all the makings of a blockbuster: cover-up and mysterious deaths at Beverly Hills High School. If she's right, Erin Brockovich could bring the city to its knees, but if she's wrong, Hollywood could destroy her.