Jon Voight, Dean Cain and Terence Stamp are set to upset Mormons across America by revisiting the religion's darkest day in a controversial new film. SEPTEMBER DAWN recalls the Mountain Meadows Massacre in 1857, when a group of Mormons, disguised as Paiute Indians, slaughtered all but 17 small children on a wagon train on its way to California. One man, the adopted son of Mormon leader BRIGHAM YOUNG, was eventually executed for the crime - 20 years later. The film, which will hit cinemas in May (07), is deemed controversial because it presents a point of view held strongly by hundreds of direct descendants of the massacre: that the iconic Brigham Young had complicity in the massacre, a view denied by the Mormon Church, even today. Voight will play a Mormon leader and Stamp will portray Brigham Young in the movie, which also features Lolita Davidovich and Jon Gries, who revived his career by starring in Mormon writer/director Jared Hess' breakthrough comedy Napoleon Dynamite.