The story of a young woman named Catherine, daughter of Robert, a brilliant mathematician, who misplaces both his brilliance and his sanity in his later years. Catherine, a budding mathematician herself, must give up her schooling and her most creatively productive years in order to take care of her father. When a former student of her father’s comes to examine his papers hoping to find valuable material in his notebooks, a romance blossoms. He also finds a notebook that contains a very important mathematical discovery and the question of whose work is in the notebook is raised.