Isabel is a glamorous blonde with a sensational past; Harriet is a bookish single would-be writer who never takes risks - except once. That risk is to answer an advert; Isabel wants to tell her story and only a ghostwriter, constantly on-hand in her luxurious Cape Cod hideaway, will be able to do it for her. The job goes to Harriet, who quickly discovers that living with Isabel is a lesson - in sex-appeal, in secrets and in seizing the moment - she''s needed all her life.