Twentieth Century Fox has debuted the trailer for Won't Back Down, the Daniel Barnz drama starring Maggie Gyllenhaal, Viola Davis, Oscar Isaac, Holly Hunter, Rosie Perez, Lance Reddick and Emily Alyn Lind.

In the film, opening on September 28, two mothers from different backgrounds--a postal worker and a reporter--join forces to take on a failing public school system and institute a charter school for children in the neighborhood, including their own.