Radio singer Joan Abbott, known as the "Crunchy-Wunchy Thrush", does not want to renew her contract with the cereal sponsor, as she wants to go to college. But her guardian, her Uncle Willie signs the contract in order to pay off his own debts. But this time Joan won't take no for an answer and enrolls under an assumed name. When Joan goes missing, the radio institutes a search for Joan via a publicity stunt.

In this swing version of the famous tale, a small town is overrun with rats. The mayor (caricature of Lou Costello) is in a quandary. His phones are busy with demands to do something. He hears a voice say: "what you need is a Pied Piper." Looking up, he sees a young man with a trombone (Jimmy Durante) who claims that he can run every rat out of town for a fee. The mayor makes a deal with him, and the trombone player goes to work leading the rats out of town with the playing of his trombone, and he locks them in a cage. Returning to the mayor's office, he's handed a bag of peanuts and thrown out. Unable to get the reward promised, the Pied Piper puts on his "Hank Swoonatra" (Frank Sinatra) suit croons to the girls. He leads them aboard a swinging showboat and opens the cage full of rats and they return to town, where only the mayor is left. The rats swarm the mayor's office and give him a bad time for his treatment of the pied piper. Production Number: D-10 A Swing Symphony cartoon.

When Speedy Gonzales invades the home of Granny and rapidly drives her cat, Sylvester, to a nervous breakdown, Granny calls on Daffy Duck of the Jet Age Pest Control company to do the job of removing Gonzales from her home.