As the United States is turned upside-down by a strange plague-like event in which millions of corpses walk the earth as blood-thirsty zombies (with the recently-deceased that the zombies kill usually returning as zombies themselves, multiplying their number), a small group of survivors of the onslaught, which include a nurse and a police officer, try to find shelter and protection within a massive shopping mall in the mid-sized city of Everett, WA. What they don't reckon on is that the zombies still have some sort of residual memory, and everyone loves going to the mall, right? Realizing that their time is running out, they decide to make another attempt at flight, to a presumably un-zombie-infested island, but to do so, they'll have to get past thousands of zombies in-between...