Jane Langley raised her younger sister, Nancy, like a mother. Now both work with Bill Prentice, an advertising executive, Jane as a clothing designer and Nancy as a model. Jane is in love with him, but Bill prefers her sister. Nancy becomes bored after their marriage. Bill wants a baby, so Nancy agrees, even though she and her sister both have been cautioned by family doctor Fredericks that they are predisposed to have great difficulty with childbirth. Nancy has a daughter, Deborah, but grows increasingly angry and sullen over time, treating Bill coldly.