In this musical comedy, Louise Ginglebusher (Deanna Durbin) is a girl from a small town who comes top New York City with dreams of making it in show business. She gets her foot in the door in a roundabout way when she gets a job as an usherette at a prestigious movie palace run by tycoon J. Conrad Nelson (Adolphe Menjou). It soon becomes obvious that Nelson has eyes for his new hire, while Louise is more interested George Prescott (Tom Drake), a young lawyer looking to establish himself. Hoping to discourage Nelson while helping Prescott at the same time, Louise fibs and tells Nelson that Prescott is her husband, and could use a job within his organization. However, Louise's white lie turns out to have unexpected repercussions. Like any Deanna Durbin vehicle, I'll Be Yours features the star singing several tunes, including "Sari Waltz" and "Granada"; two years after making this film, she would retire from the screen.