Sarah's life is in pieces after the brutal death of her 18 year-old son. One night, her car accidentally hits Arthur, a young man the same age as her boy who is running from a burglar. Sarah sympathizes with him and takes him in, only to be tracked down by the burglar whose murderous rage towards Arthur forces her to take action.

Liberal district attorney decides to seek the death penalty for a man who slaughtered a family at Christmastime, then drank their blood. He escapes, though, and starts killing again.