Britt Phieffer is not that adventurous. She has followed the leads of others her whole life; her brother, her best friend, her boyfriend. But when her boyfriend, Cal, breaks up with her, Britt is through with playing it safe. For spring break, she convinces her best friend, Korbie, to hike the Grand Tetons with her, something she has never even considered. But Cal is an expert hiker and if there is one thing that will impress him, it's this. She'll train and plan the perfect trip and show everyone how strong she can be. When a freak storm strands the girls in the woods and she is certain she has made the dumbest decision of her life, they come across a cabin and two knights in shining armor, Shaun and Mason. But soon they find out that Shaun and Mason are on the mountain for very different reasons than hiking. They have done something terrible and they need to get off the mountain. Fast. They need Britt's knowledge of the area to guide them and won't take no for an answer so they set out on a harrowing journey through the cold. Britt realizes the only way to get out of this alive is to pretend she is on their side. So she plays nice with the (admittedly sexy) Mason and becomes so entangled she can't keep track of who is actually in control. It is only a matter of time before things turn deadly and Britt truly has no one to rely on but herself.