Lisa uses her time during spring break at the power plant. Bart places a collect call on Lisa to help him and his friends return home without having Homer and Marge know. Bart becomes a courier but does not get enough money to go home. Principal Skinner sees Bart in Hong Kong while being a courier. Lisa makes Homer promise that he will not get angry about Bart, so she tells Homer where Bart is. Homer orders a new console for the power plant from Oak Ridge so Bart can get home. He gets it shipped near Knoxville, where Bart is still a courier. Nelson, Milhouse, and Martin hide in a crate.