There was a power of endurance about her, and a courage that was almost awful. Did Lady Mason forge a codicil to her husband's will, allowing Orley Farm to pass to her son or not? Orley Farm centres on this case of forgery, and the anguish and guilt of Lady Mason. Surrounding this enigmatic woman and her apparent crime are her elderly lover, Sir Peregrine Orme; her principled but thoughtless son...