In the charming rural town of Trail Stop, Idaho, accessible to the outside world by only a single road, young widow Cate Nightingale lives peacefully with her four-year-old twin boys, running a bed-and-breakfast. Though the overnight guests are few and far between - occasional hunters and lake fishermen - Cate always manages to make ends meet with the help of the local jack-of-all-trades, Calvin Harris, who can handle everything from carpentry to plumbing. But Calvin is not what he seems, and Cate's luck is about to run out. One morning, the B&B's only guest inexplicably vanishes, leaving behind his personal effects. A few days later Cate is shocked when armed men storm the house, demanding the mystery man's belongings. Fearing for her children's lives, Cate agrees to cooperate - until Calvin saves the day, forcing the intruders to scatter into the surrounding woods. The nightmare, however, is just beginning. Cate, Calvin, and their entire community find themselves cut off and alone with no means to call for help.