When 30-somethings Sam and Jamie lock themselves out in the communal stairwell they're forced to consider that maybe they aren't as close as they thought.

A zombie apocalypse threatens the sleepy town of Little Haven—at Christmas—forcing Anna and her friends to fight, slash, and sing their way to survival. In a desperate race to reach their loved ones, they soon learn that no one is safe in this new world, and with civilization falling apart around them, the only people they can truly rely on are each other.