Six years after Earth has suffered an alien invasion, a cynical journalist agrees to escort a shaken American tourist through an infected zone in Mexico to the safety of the U.S. border.
A freak storm unleashes a species of bloodthirsty creatures on a small town, where a small band of citizens hole up in a supermarket and fight for their lives.
As a war between humankind and monstrous sea creatures wages on, a former pilot and a trainee are paired up to drive a seemingly obsolete special weapon in a desperate effort to save the world from the apocalypse.