Modeled after the popular toys (horror-themed or gross-out characters with a large ball for their head and body) a musical band made up of Madballs, tries to escape an oppressive planet. They plan to come to Earth and play rock and roll.

It begins with a warning. It is said that the episode contains scenes that may offend viewers. It is also said that most viewers may experience nagging backache, rapid heartbeat, post-nasal drip and delerium, swelling of the nose, throat, and abdomen and loss of facial hair. Repeated viewing of the episode will result in the loss of one's bodily functions, redistribution of facial features, and a difficulty in forming simple sentences. The announcer concludes the warning by saying that you should definitely watch this episode if you really want to have a career as a lawn ornament. After the roll call(which curiously excludes Bash Brain), Bash Brain appears and says that he's never seen anything so awful in his life. He then reminisces about some time in a hosptial.

The Madballs are a zany animated rock band who rock and roll their way across the galaxy. Music is illegal on their home planet so they make a break for it on Earth.