Five stranded teenagers must battle for their lives against a group of escaped convicts, and each other, in this shocking survival thriller from the author of "Bad Girls" and "Lost Summer."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.