An FBI agent’s idealism is put to the test in Villeneuve’s raw-nerve chronicle of a government task force’s efforts to take down a powerful Mexican drug cartel. Emily Blunt stars as Kate Macer, who finds herself recruited to join a CIA-linked team (including gruff spook Josh Brolin and enigmatic assassin Benicio Del Toro), but their endeavors will bring her to an obscure new realm of violence and corruption.