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 Camp Archstone -- bootcamp for troubled teen girls. There, on a vast, remote, sparsely populated island, Anna will be expected to change her ways and repent for the sins her religious father just can't seem to forgive. Here's a hint: There's a boy involved. No, a man.

Life at Camp Archstone is Anna's worst nightmare. Every minute of the day is scheduled, the counselors are hardcore, and one girl is crueler than the next. But when a grueling hike into the forest goes horribly wrong, things go from bad to worse. Stalked by an unknown foe and left to fend for themselves, the girls band together to try to find their way back to civilization -- and that's when the real trouble begins.

Courtney Stanton thinks she's on just another ski trip with her friends -- until a horrific car accident strands them all on an isolated Colorado road during a blizzard. Frightened but alive, Courtney and her companions discover an abandoned vehicle nearby, and seek help. But the vehicle turns out to be a prison van, with the inmates missing, and the guard's dead body in the front seat.

Soon after, a stumbling figure emerges from the snow, a handcuffed refugee from the van. He says he's been in prison for selling meth, but that he once served in the army. Dare they trust him? He pleads innocence about the guard's murder, warns them about the other fugitives, and promises he will help guide them out of the wilderness. But as the group begins a nightmare trek across the frozen landscape, they start to get the feeling he hasn't told them the entire truth, and someone -- or something -- is secretly watching their every move.

When Caitlin Ross's mother takes her and her brother to an island in the remote Outer Banks for the summer, Caitlin is furious. She was planning on spending the summer hanging out by the pool, partying, shopping, and singing backup in her boyfriend's band, Box of Flowers. North Carolina isn't anything like California, and Caitlin doesn't fit in. But her troubled mother is too busy popping pills and trying to win back her creepy ex-boyfriend to care.

At first, the only friend Caitlin makes on the desolate island is a local misfit named Danielle. But things start to improve when she meets a bunch of visiting prep school boys and gets swept up in their exciting world. Then, one dark night, she witnesses a murder and begins to suspect that her new friends aren't really her friends at all. With a powerful hurricane approaching, and the island cut off from the outside world, Caitlin has no one to turn to but herself . . . and whether she'll live to see another summer is the biggest mystery of all.