After a lifetime serving the needs of the super-elite, maid Lizzie (Ruth Donnelly) decides to take a step down and become the housekeeper for the solidly middle-class Smiths after taking a shine to Mrs. Joan Smith (Margaret Lindsay) at an employment agency. Winning over the reluctant Jimmy Smith (Warren Hull), Lizzie quickly demonstrates her worth as she subtly guides the Smiths up the social brackets, much to the benefit of the insurance agency where Jimmy works. The Smiths' circle soon includes socialite Diana Abercrombie (Anita Louise), a young lady of keen interest to Lizzie. As Joan's younger brother Kent (Frank Albertson) falls for Diana, she also becomes the subject of interest for the married and predatory Warren Sherrill (Gordon Elliott). Compelled to protect Diana's virtue, Lizzie makes a risky confession - one that threatens the Smiths' standing and her future.