The cultivated Mrs Adela Gereth is worried that her son Owen will marry Mona Brigstock - she considers Mona to be brash and completely unsuitable. Owen soon gets engaged to Mona and expects to take over Poynton, the family's large country house, which is filled with valuable antique furniture, pictures and collections. Mrs Gereth does not want to let go of the house, but she is even more attached to the contents.