A scientist studying an ancient crypt near a grand mansion accidentally unleashes an evil curse. The curse reanimates the dead buried in the area and the zombies devour the scientist. Three jet-set couples and the son of one of the women arrive at the mansion at the scientist's invitation. The guests are quickly attacked by rotting corpses as they begin rising from their graves. The group of people locks themselves in the mansion, and past nightfall, the zombies begin their siege. The first victim is Kathryn, the maid (Anna Valente), who is pinned to a window and decapitated with a scythe. The zombies then begin to display unusually high levels of intelligence, using tools, axes to chop through doors, etc. One of the guests, George (Roberto Caporali) tries shooting at them, but quickly run