Therese is just an ordinary sales assistant working in a New York department store when a beautiful, alluring woman in her thirties walks up to her counter. Standing there, she is wholly unprepared for the first shock of love. Therese is an awkward 19-year-old with a job she hates and a boyfriend she doesn't love; Carol is a sophisticated, bored suburban housewife in the throes of a divorce and a custody battle for her only daughter. As Therese becomes irresistibly drawn into Carol's world, she soon realizes how much they both stand to lose.