When the adults in this small town become monsters, it's time for the children to grow up. And fast. Nestled in the pine-studded hillsides of New England rests the town of Greendale, population 3,812 - and that population just got a heck of a lot smaller. That is, if the Census Bureau decides not to count the walking dead. And if all the adults have become the legions of the undead, who will protect the children?