Adapted from Sidney Howard's 1924 play, They Knew What They Wanted, Frank Loesser's The Most Happy Fella revolves around the complications that arise when Tony, an aging Italian vineyard owner, proposes by mail to Rosabella, a young waitress who once served him in a San Francisco restaurant. Rosabella has no recollection of Tony, but accepts his proposal, largely because he has sent her a picture of Joe, his handsome ranch hand.
When Rosabella arrives at the ranch, she falls in love with Joe, but marries Tony because she doesn't know what else to do. Over time, Rosabella learns to appreciate the gentle and kind Tony, and she falls in love with him.
A simple love story - with a few strange twists - that shows that love can win out in the end no matter what the obstacles.