It starts with a strange glowing fog that arrives at the height of a snowstorm. A terror from the past has returned, bringing with it death and destruction that threatens to overrun the town. The old stories tell of a post-war experiment gone wrong, one that opened the way for the fog—or whatever was behind it—to begin its reign of terror. A small team of workmen are the last hope to keep their town alive through the long, storm-filled night. But the many horrors that await them are beyond anyone’s worst nightmares.