Bart gets a credit card and buys a well trained new dog called Laddie. When Bart cannot pay the balance on the credit card the bank repossesses Laddie. Instead of giving them Laddie, Bart gives the repo men Santa's Little Helper. Feeling guilty Bart gives Laddie to the police and sets out to finds Santa's Little Helper and finds him at a blind mans house. Bart tries to kidnap his dog, but instead the blind man alerts the police. When they arrive, Laddie, who is now a police dog, sniffs out a bag of marijuana and the blind man gets arrested. Bart can then leave with Santa's Little Helper.