在明尼苏达州北部的“边界水域”中，六个老朋友之间的周末露营之旅在神秘的环境下死亡后变得悲惨起来，随着他们企图在本集团内揭露杀手，引发进一步的动荡。
When an alien hunter arrives on post-apocalypse Earth, it takes down a gang of warlords and unexpectedly becomes a folk hero to the oppressed locals. Now with their support, the alien sets its sights on the warlords' ruthless leader.
影片改编自真实故事。讲述校车司机Kevin（马修·麦康纳 Matthew McConaughey 饰）在猛烈的野火中拼死救援一位尽责的老师（亚美莉卡·费雷拉 America Ferrera 饰）与她的学生们。
