Struggling matrimony agents Heckle & Jeckle get one last chance to find a bride for a well-to-do client, a hippo girl. The father of the 400-pound girl offers our heroes $1,000 if they can get his daughter married. She has fallen in love with trapeze artist Dimwit the dog. Dimwit wants no part of the obese society matron. But the pair finally get the hapless circus performer to sign a marriage license by making him think that he has signed up with a much more prestigious circus run by C.B. Barnyard (Jeckle in disguise).