 Betty receives an invitation to a party from her elderly relative, Grampy.As she strolls along singing "I'm On My Way to Grampy's", she is joined by two moving men, a fireman and a traffic cop—all who irresponsibly drop everything (including a piano, a burning house and a traffic jam) to go to Grampy's party.Grampy is an eccentric inventor, whose labor-saving devices are of the Rube Goldberg variety.