From the trailer, the basic storyline is of a magic portal between Book of Mormon times and modern day. I'm not sure what time period of the Book of Mormon is on the other side of this passageway, but you see tribal looking Lamanites come through. The lamanites are waging war on the Nephites (surprise there, huh) and a modern day girl gets mixed up in it somehow. One of the Nephites comes through the passage and becomes the love interest. Of course they all speak English.
As far as LDS movies go, and judging solely from the trailer, this one looked like it had a much better production budget to work with. Still full of cheese, but if I had to watch it, it would probably entertain me. It wouldn't be like the Book of Mormon movie, which was torture to sit through.
Someone will need to go see this and return and report. I think it opens tomorrow.
Edited to add:
Apparently this was a screenplay, turned novel, turned screenplay again. Here is the synopsis...
Sakerra and Brock McConnell are Californians who are being forced by law to separate after their mother's death by overdose. In an attempt to keep the small family together, the orphans steal a car and drive to their Mormon relatives in southern Utah. Within a forest on their relatives farm is a portal to the ancient American world, where the Nephites are fighting to protect their lives from the ruthless attacks of the Gadiantons. This portal was opened up when an earthquake hit the area. Kerra and Brock get associated in this fight, but are also being chased by the gang that Brock used to be in called the Shamans.
Ummm...where are there any dense forests in Southern Utah???