"Romance on the High Seas"

Elvira Kent (Janis Paige) and her husband Michael (Don DeFore) suspect each other of cheating. For a wedding anniversary, Elvira books an ocean cruise to Rio de Janeiro. When her husband claims that unexpected business will prevent him from going, Elvira pretends to take the trip alone, sending in her place singer Georgia Garrett (Doris Day), a woman she had met at the travel agency. This will give her the opportunity to find out if Michael is indeed sneaking around behind her back. Meanwhile, Michael hires private detective Peter Virgil (Jack Carson) to check up on her.

As part of his job, Peter becomes acquainted with Georgia (believing her to be Elvira). They gradually fall in love, which makes reporting to Michael very uncomfortable for Peter. By chance, Georgia's boyfriend, Oscar Farrar (Oscar Levant), is also aboard. When Peter spots them together, he thinks he has discovered the identity of Elvira's lover.