After eleven years of marriage Christina faces the facts - she has left her husband and children and is nearing the day of her divorce. As she recalls the factors that led up to her break-up with Charles and her passionate new attachment to Philip she discovers in a flash the truth about herself.Her confidence is shattered. It is as though - on the point of slaking her thirst at the well of her new passion - she has discovered something venemous at the bottom of the cup.