Will the orphan girl win her hero in spite of scheming relatives who seek to keep her in the background?

The department store clerk Mary prevents a robbery at the store where she works, involving a necklace belonging to a rich unmarried woman named Eva Bandy. Later, she manages via a misunderstanding to prevent a million-dollar robbery of the same woman. With the man of her dreams, who helped her foil the robberies, she is "adopted" by Eva.