Bad girls

Anna Wheeler's parents have had it up to here. They can't seem to control their daughter anymore and so, one night, Anna's yanked from her bed and carted off to bootcamp for troubled teen girls. Anna will be expected to change her ways and repent her sins her religious father can't forgive. Here's a Hint: There's a boy involved. No. A man. When going on a grueling hike, her and the other girls are being stalked by an unknown foe and left to fend for themselves. The girls learn to band together for civilization.