Margit Agnew (Myrna Loy) is the domineering head of a wealthy family, which includes her deferential younger sister, Irene, and Irene's milquetoast fiancée, Waldo. Unbeknownst to Margit, the couple secretly dream of Hollywood careers and have gotten involved with local theater gypsy Charlie Lodge (William Powell), who lives in a trailer next to his favorite bar. When Margit discovers these wild ideas, she intervenes to "save" her sister. Charlie has taken a fancy to Margit and forces her into an unusual bargain: She must spend three weeks with the mad bohemian and, in return, he'll never see Irene again. But when Cupid's arrows start to fly, things really get crazy.