Feeling overshadowed by their respective older brothers Bart and Sideshow Bob, Lisa and Cecil become new archenemies to each other.
Lisa is having a good day at school until she splashed by a puddle and laughed at by her classmates. She gets on the bus, soaked and sighing, she sees her brother get lots of attention. On the bus, a new boy sits with Martin Prince who tells the new boy that Bart is the ultimate troublemaker and cool kid of the school. Lisa tries to introduce herself but he is only impressed with the fact that she is Bart’s sister. Lisa becomes jealous of her brother.
Meanwhile at Springfield Penetentary, Cecil Terwilliger is accidentally soaked with a fire hose and laughed at by the other convicts. Bob walks around the yard getting lots of calls from the others. Just like Lisa, Cecil is under the shadow of his brother, never getting the fame he wants.