Charley Wyckham and Jack Chesney pressure fellow student Fancourt Babberly to pose as Charley's Brazilian Aunt Donna Lucia. Their purpose is to have a chaperone for their amorous visits with Amy and Kitty, niece and ward of crusty Stephen Spettigue. Complications begin when Fancourt, in drag, becomes the love object of old Spettigue and Sir Francis Chesney.
Mr. Hammer runs a bankrupt Florida hotel. He'll try anything to make money, even make love to rich Mrs. Potter. But his main scheme, selling real estate, is in danger of sabotage from zanies Chico and Harpo, who also reduce the schemes of a pair of jewel thieves to chaos. A subplot involves the star-crossed love of Polly Potter and architect Bob Adams.