The life of Jack and Grace Endgel, newly married, seems ideal. Jack is an enthusiastic lawyer devoted to his profession—he hasn’t lost a single case. Grace is a happy housewife and impeccable keeper of the home hearth; she cooks wonderfully and skillfully tends the garden. It seems like they have everything. Their dinner parties are first-class; their house is charming with comfort and perfect order… But what happens in it when the front door closes behind the last guest?