In the five years that have passed, each of the survivors is coping with the knowledge zombies nearly killed them. A covert team investigating the rising dead silences outbreaks around the United States until they discover the next outbreak is only miles down the road from Boxford High at the King David Mall.
The suburban town of Boxford remains oblivious to the heroics of a small band of high schooler's that kept the zombie apocalypse at bay. Now, the school is rebuilt, and the auditorium is being dedicated to the aloof teachers who vanished in the fire. The few survivors have been invited as guests of honor. In need of clothes worthy of the ceremony, they head to the mall.
Angry moms and vicious mall walkers threaten to destroy mankind. With new additions to the cast, they fight their way through zombie hoards and clearance sales. While the outbreak ravishes the mall, something darker is afoot and may shake the graduates to their core.