Shaun of the Dead - Ed answers a cell phone call

Underachievers Shaun and his best buddy, Ed, turn out to be North London's last--and we mean last--hope when zombies overrun the town. Zombies are in the streets, in the shops, on talk shows, you name it. But they still want to eat humans, and they still need beheading. What to do? And how to keep Shaun's girlfriend out of their clutches