When Grampa gives each member of the family a portion of his savings, Lisa and Marge spend their money in drastically different ways. Lisa invests in Nelson's brand-new business venture, but soon realizes that her friend's instant success might lure him away from the classroom. Worried that his judgment might be clouded, Lisa introduces Nelson to the well-educated and successful creator of Facebook, Mark Zuckerberg, only to find out that he too dropped out of school. But when the soaring business suddenly takes a sharp turn, Lisa teaches her friend that education is invaluable.