A father and son are sleeping outside in the cold. The father awakens from a dream of him and his child in a cave, facing a huge, nameless creature that eventually runs away into the dark. At dawn, the father (who, along with the son, remains nameless throughout the novel) surveys the landscape, trying to decide where they will travel next. He is unsure of month or day, because "he hadn't kept a calendar for years." The scene before him reveals ash from a post-nuclear holocaust falling from the sky and drifting across the landscape. The father and son are survivors, fighting to live in a world that has been destroyed by nuclear bombs and ravaged by chaos and confusion.