The three great-nephews of cantankerous Mr Penicuik know better than to ignore his summons, especially when it concerns the bestowal of his fortune. His freakish plan is that his fortune will be his step-daughter's dowry.
Martin believes he can possess both a beautiful wife and a delightful lover. But when his wife, Antonia, suddenly leaves him for her psychoanalyst, Martin is plunged into an intensive emotional re-education. He attempts to behave beautifully and sensibly. Then he meets a woman whose demonic splendour at first repels him and later arouses a consuming and monstrous passion. How will he survive it?