Like its predecessors, “George A. Romero’s Survival of the Dead” takes place in a desperate, nightmarish world where the dead walk the earth, relentlessly attacking the living. It is the story of Plum Island – a beautiful refuge whose isolation allows two powerful families to maintain a semblance of order in the wake of the zombie holocaust. But as the inhabitants slowly die off, the two clans become sharply divided: the O’Flynns believe that the undead must be destroyed without exception, while the Muldoons insist that afflicted loved ones be kept “alive” until a cure is found. The result is an escalating showdown with echoes of a classic Western stand-off that erupts in brutality and violence.