Set in the deep freeze of a northern Michigan winter, when a group of college students volunteer to assist their psychology professor with his research, their weekend retreat turns into a nightmare....

在妻子莉（朱迪·汤普森 Jody Thompson 饰）去世一年后的圣诞节，年轻有为的医生泰伦斯·赛德（艾瑞克·麦柯马克 Eric McCormack 饰）驱车带着女儿辛希娅（科娜·德维利 Conner Dwelly 饰）和儿子杰克（瑞恩·格莱瑟姆 Ryan Grantham 饰）前往位于某个山林腹地的小木屋共度佳节一路上车马劳顿，加上半路突发的一个小车祸，这些都没有冲淡孩子们心中对快乐的期待。夜...