Robert Caine (Kirk Douglas) is a wealthy and powerful industrialist, an engineer who develops nuclear power plants. A true believer in nuclear energy, he plans to make nuclear generation commonplace around the world. He is about to retire and turn over the running of his corporations to his son, Angel Caine (Simon Ward) when he begins having disturbing dreams. In one of these, the vision of the Apocalypse as spoken of in the Biblical book of Revelations comes to life in a horrifying way. After this, he begins to notice that his son is behaving in ways which identify him with the Antichrist.