Aboard a train, philandering gentleman womanizer Hugh Winterbourne meets pregnant Connie Doyle (19), who desperately left her hometown being kicked out by her brutish boyfriend Steve DeCunzo. The train crashes, killing Hugh and Patricia, the pregnant new wife he was to present to his family. Connie is accidentally mistaken for Patricia and after hospitalization brought to the late Hugh's grand family estate. There she is warmly welcomed by her 'in-laws', meddling matriarch Grace Winterbourne and her perfect son, Hugh's conformist responsible twin brother Bill. His romantic feelings for his 'sister in law' are reciprocated, albeit awkwardly. Although accepted by Father Brian Kilraine, Grace's favorite guest, and Bill's confident, chauffeur Paco, Connie feels guilty and considers leaving, but that would rob her baby of the far better future only such a rich family can offer. Then the biological father Steve turns up, to blackmail her.