In 1984, divorced schoolteacher Andrew Walsh takes up a new job in Llanstaff, North Wales. It's a good place, a fine place ...a ,little surreal, perhaps, but nevertheless a place which feels like home - which is odd, as he's sure he's never been to Wales in his life. Andy settles in the town, in his jib, meets the love of his life in a fellow teacher - all's well in his world.
But then the fog rolls in, and the killings start. Then monsters can be glimpsed in the mist. Then he finds out he isn't who he thought he was, and that he has to stand and fight the powers of Chaos in order to save the world.