Zombie king George A. Romero is back with a fourth gruesome tale of the walking dead -- and this time, they`ve taken over the planet. Humans have lost the battle against the flesh-eating ghouls, and the living are now barricaded within a walled city reigned by ruthless despots. When the zombies develop advanced military tactics, it`s up to a group of mercenaries to save the living. Dennis Hopper, Simon Baker, John Leguizamo and Asia Argento star.