Arthur's piano teacher is retiring, so he gets a strict new teacher, Dr. Fugue. When Arthur fails to practice sufficiently, Dr. Fugue fires Arthur. Wanting to be rehired, Arthur begins practicing the piece he was supposed to practice. Buster tries selling chocolates for a school fundraiser, but he ends up eating all of them. Since he does not have the money to pay for them, he opts to make and sell his own chocolates to pay off his debt, but they end up tasting awful. Mr. Haney gives Buster another chance by having him work in Jack's Joke Shop for a weekend.