AllMovie

In this instance at least, What Every Girl Should Know doesn't come in a plain brown wrapper. Patsy Ruth Miller stars as 17-year-old Mary Sullivan, who is shipped off to an orphanage with her kid brother Bobby (Mickey McBan) when their older brother-guardian Dave (Carroll Nye) is framed on a bootlegging charge. Mary and Bobby are rescued by wealthy Arthur Graham (Ian Keith), who serves on the orphanage's board of directors. He adopts the two "kids," only to run into interference from his snobbish aunt (Lillian Langdon). Undaunted, Mary wins the hearts of Graham's society friends by developing into an expert tennis player. Graham is so impressed by Mary's prowess on the tennis court that he arranges for the release of her brother Dave -- and, incidentally, proposes marriage to the heroine.