Brain's latest scheme for world domination involves pretending to be a baby hippo (delivered by Friz Freleng's famous drunken stork) for proud new parents Flavio and Maurita to reap an inheritance. However, a series of painful lexperiences, such as a doctor's visit (featuring another classic character, the little man from the draft board, as a veterinarian), lead him to rethink this big baby scam.