Follow the Prophet (2009)

On her 15th birthday Avery Colden discovers that she is to be given as a secret bride to the new Prophet of a religious cult. She escapes with the help of Army Colonel Jude Marks and a renegade female sheriff. When they find out that a younger girl will take her place as the secret bride they join forces to expose the truth that lies hidden in a town in Utah. Col. Marks calls in favors from the military and Washington but even that may not be enough to help them fight the deeply secretive cult.