A variety of broad-painted and unlikely characters are trapped in an underground café when a Mississippi River levee breaks and causes flood havoc above and below.

While Jane and Jim Parker witness the divorce proceedings of Jane's parents, the George Reeds, they resolve that such a disaster will never occur in their happy lives. But when Jim achieves success in Reed's company, he becomes increasingly interested in his new fast friends, especially vamp Gloria Gayne; and he asks Jane for a divorce.