Varg Veum is no longer working as a private investigator. He's got a permanent job as a teacher, and has calmed down his life, enjoying the domestic bliss with his new girlfriend Karin, but the idyll doesn't last long. Veum gets a brutal meeting with the past, when "The Knife" is released from prison, determined to take revenge on those who got him convicted for the murder of a teenage girl.

詹妮科（Ingrid Bolsø Berdal 饰）与朋友们去挪威中南部优兹黑姆山滑雪，结果遭遇变态杀人狂，朋友惨遭杀害，而詹妮科在一番搏斗之后将杀人狂推入冰缝，艰难逃生，最终被人搭救。
在当地的奥塔医院中，她向警方诉说了惨剧的经过。警方迅速展开搜索，很快发现杀人狂以及遇难者的尸体，并将尸体运回奥塔医院暂时保存。然而杀人狂的命竟如此刚硬，他渐渐苏醒过来，旋即展开了大屠杀，医院瞬间变成人间地狱。
再次逃生的詹尼科决心重入雪山，彻底除掉这个恐怖无情的杀人魔王……

When one of them breaks a leg, five friends snowboarding in the Norwegian mountains take shelter in an abandoned ski lodge and soon realize they’re not alone.