在一次差点丧命的车祸之后，大卫·张伯伦有了一个空前的发现。这一发现不仅将决定他的家人的命运，也将决定整个人类的命运。
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.
阿拉斯加的一个与世隔绝的小镇，在一次小型陨石爆炸后发生污染。
