In the near future, aliens have invaded Earth and declared a galactic war resulting in thousands of human casualties. To save Earth, a team of four teenage astronauts brave the alien wilderness of a distant planet to stop an assassin from changing the course of history forever.

　　In the year 2961, the time is after humanity and nature has recovered the land. A hunter named Cygnus is called to rise above his duty. He provides for Last Arc, a once nomadic band of survivors in need of food and water that is now growing scarce. The answer must be found before a group of outlandish Heretics descend upon them. Cygnus must voyage across the treacherous landscape to defend his people. Sent by Nova, the matriarch of the band, she acts based on her vision for Cygnus to find a seed of hope. The future of Last Arc is for him to discover, Cygnus ventures into a hostile landscape in search of an answer for his people. On this journey of encountering many traps and dangers, Cygnus discovers what has been hunting him is his identity.

几个芝加哥大学附属医院高材生，在好奇心的驱使下，策划了一场探索死亡奥秘的疯狂实验。他们轮流躺在手术室里进入死亡状态，再由其他守护的同学将自己救活。这场惊险又刺激的死亡穿梭，在一个漆黑的深夜里一步步的开始了。　　第一个进行测试的纳尔逊（基弗·萨瑟兰 Kiefer Sutherland 饰）在“死”去之后，遇见了因他的侮辱而死去的男孩。死而复生后的纳尔逊，虽然各种感官都变得更加敏锐和灵敏，却陷入深深的梦魇之中；接受实验的第二个人是好色的乔（威廉·鲍德温 William Baldwin 饰），他见到了各种色情场面，并且遇见了曾虐待过的女孩；紧接着，戴维（凯文·贝肯 Kevin Bacon 饰）也接受了实验，他则将死亡实验延迟到了两分钟；女学生蕾切尔（朱莉娅·罗伯茨 Julia Roberts 饰）更是在死亡时间里，重温了父亲自杀的经过。在体验过死亡世界之后，那些挥之不去的往日记忆开始无孔不入的侵占他们的一切。

　　阿拉伯大陆板块的突然移动，引发了强烈的大地震，同时带来了海啸，这样的威力不仅摧毁了附近执行任务的战斗机，甚至掀翻了航空母舰。剧烈的大陆移动也导致天气变得越来越不稳定，尤其是夜幕降临时温度急剧下降，寒冷突然来袭，全球陷入一片恐慌与混乱之中。美国琼斯一家此时正在埃及度假，逢此浩劫的琼斯试图逃往安全的区域，希望有人能帮助他们一家度过此次劫难。地球再次迎来一个新的冰河时代，狮身人面像、金字塔、撒哈拉沙漠都覆盖在皑皑白雪之中。

当五个朋友在一个偏远的湖畔度假时，他们期待着一个不错的时光，不知道地球正在遭受外星人入侵和大规模绑架。