All you have to know about this movie is contained in the title. Young is a wealthy young businessman who falls for Hussey, his executive secretary. She is part of a YOU CAN'T TAKE IT WITH YOU family that includes Kibbee and Padden as her parents and Turner as her jitterbugging sister.
Young is in love with Hussey, but she doesn't want to marry him until he sees the kind of family she's from (which is very close to the plot in George S. Kaufman and Moss Hart's play). Young decides that the only way to get Hussey is to prove his love and his ability to understand her background,
so he moves in with the large family. Ayres does a neat bit as a middle-class young man ...