Aunt Lil is so thrilled to hear she will be a great-aunt that she takes some time off to visit Jefferson City and offer her congratulations. When there, she decides to stay a few days, and has Mrs. Gurney call her boss to say she's ill.

Mr. Peepers and his father-in-law Pa Remington decide to spend a day fishing, but they're after no ordinary catch. For fifteen years, Pa has been trying to hook a large trout, unofficially known as "Old Colonel." He thinks the assistance of his scientifically-minded son-in-law may do the trick this time.