An unusual and funny love story about a modern woman who realizes she's looking for an old- fashioned kind of romance. Mathematics professor Kate Gunzinger (Jill Clayburgh) has everything the modern woman is supposed to want: A successful career, financial security and an active social and sex life - but somehow it's not enough. While attending her father's wedding in New York, she meets and falls in love with her new stepmother's son (Michael Douglas), a former baseball player who sweeps her off her feet. Immediately, Kate is confronted with three problems: how to deal with her animosity towards her father's new wife, what to do about her old boyfriend, and how to handle a relationship that, in some strange way, borders on incest!.