Gary King (Simon Pegg) is an immature 40-year-old who's dying to take another stab at an epic pub-crawl that he last attempted 20 years earlier. He drags his reluctant buddies back to their hometown and sets out for a night of heavy drinking. As they make their way toward their ultimate destination -- the fabled World's End pub -- Gary and his friends attempt to reconcile the past and present. However, the real struggle is for the future when their journey turns into a battle for mankind.