Dinah, Willie, and Susan have long outlived the scandal associated with their ten-year-old menage-a-trois. Dinah, an avante-garde compler, treasures her independence. Yet it takes Willie's kindness and Susan's fire to sustain her. Willie is a left-wing sculptor in a right-wing age. And Susan, his wife, is a fabric designer who craves glamour, wealth, and the attentions of the summer people who visit Cape Cod every year. Then one summer, the balance...