Christmas in Little Haven is about to be interrupted by a horde of zombies. Anna and her friends will have none of it. They use every tool at their disposal to survive a hilarious Christmas Eve with the undead. Along the way Anna's group of zombie warriors turns their life-or-death struggle into a holiday musical, using the songs of the season to buoy their Christmas spirit. The friends will learn a powerful lesson about the importance of sharing the holidays with family and friends.