Upon moving to Britain to get away from American violence, astrophysicist David Sumner and his wife Amy are bullied and taken advantage of by the locals hired to do construction. When David finally takes a stand it escalates quickly into a bloody battle as the locals assault his house.

A descent into Hell is triggered when "Ex-Lord" Donald Brocklebank finds that he must leave Longleigh House for London to find a way to pay for the medical treatments for his wife Nancy. Alone, his over-protected, delusional, adult son, James, fancies himself in charge of the manor house with his terminally ill mother, and barricades the two of them into the house for a series of ever more panicked home treatments, mistakenly protecting her from the arrival of Nurse Mary and any outside help.

The radiation from a fallen satellite might have caused the recently deceased to rise from the grave and seek the living to use as food. This is the situation that a group of people penned up in an old farmhouse must deal with.