Shocked by the death of her spouse, a scheming widow hatches a bold plan to get her hands on the inheritance, unaware that she is targeted by an axe-wielding murderer who lurks in the family's estate. What mystery shrouds the noble house?
The story follows characters Ben (Duane Jones), Barbra (Judith O'Dea), and five others trapped in a rural farmhouse in Pennsylvania which is attacked by unnamed "living dead" monsters, drawing on earlier depictions in popular culture of zombies.
A French Army officer, Lieutenant Duvalier, has been separated from his unit and receives help from a mysterious woman. He follows her to the castle of Baron Von Lepp only to find that she is the Baron's wife who died 20 years ago.