During a family outing to an Indian-owned casino, Bart sees a vision of his future courtesy of the wise Native American casino magnate. Flash forward thirty years: Bart is crashing on Ralph Wiggum's couch, trying his hardest to make it as a rock guitarist. His sister has just been elected the first straight woman President of the United States and when Bart gets evicted for not paying rent, he decides it's time to pay Lisa a little visit at her new home. Bart moves into the White House, which is already overrun by Homer and Marge and Maggie, Jr., Maggie's beautiful baby girl. As Lisa begins her Presidency, Bart makes a total nuisance of himself, interrupting press conferences to promote his demo tape, setting off the Secret Service with his Frisbee, and using an official Presidential helicopter to fly in Ralph Wiggum to hang out and drink beer. Lisa and her top advisor, Milhouse, decide to send Bart on a wild goose chase to get rid of him. But when Bart discovers the plot, he is hurt and offended. Returning to the White House, he finds Lisa in a critical meeting with other leaders of the free world, begging them not to collect the loans they gave to her financially strapped country. Bart, who is by now an expert at dodging creditors, helps Lisa fend off their demands and saves the day. Back in the present, Bart realizes that he can change his future if he tries and goes off with Lisa and tells her all about his vision.