The Walking Dead is centered on Rick Grimes, a small-town police officer from Cynthiana, Kentucky, his family, and a number of other survivors who have banded together in order to survive after the world is overrun with zombies. As the series progresses, the characters become more developed, and their personalities shift under the stress of a zombie apocalypse. Fighting growing despair — and sometimes each other — the group searches for a secure location which they can finally call home.