After finding out that all of the nuclear power plant's staff members had been informed of the plant's closure for maintenance via e-mail,
Homer decides to buy a
computer. After
Lisa sets up the computer for him, Homer starts his own
webpage, which contains copyrighted material from other pages. To avoid getting sued, Homer calls himself "Mr. X". Late at night, unable to sleep until someone visits his page, Homer hears a rumor from
Bart started by either
Nelson Muntz or
Jimbo Jones that
Mayor Quimby spent the street repair fund on a secret swimming pool. He posts this rumor on his page, which is seen by several of Springfield's citizens, and reporters find a luxurious pool along with many scantily dressed women in Quimby's office building. Homer keeps anonymously investigating and posting more scandals, including
Mr. Burns selling uranium to terrorists (resulting in Burns getting arrested by the FBI),
Apu selling expired doughnuts as bagels, and various unprofessional acts by the Springfield Police Department (although he overlooks
Krusty's admission to
vehicular manslaughter). Eventually, Mr. X wins the
Pulitzer Prize for his journalistic achievements, despite no-one knowing who he is. When he hears that the prize money will be given to starving children, Homer reveals himself as Mr. X. However, this ends up alienating Homer from the rest of the town, as no-one feels comfortable confessing their secrets now that they know he is Mr. X, and his fame soon plummets. To boost his popularity, Homer begins posting
outrageous fake stories on his webpage. Regaining his fame, Homer celebrates by going to a
Kwik-E-Mart which turns out to be fake, and he ends up being kidnapped. Homer wakes up on the "Island", a place where the inhabitants are people who have been exiled from society for harboring dangerous secrets. Homer learns from the organization's leader,
Number Two, that a story he wrote about flu vaccinations containing a mind-control serum is true; the mind control drug is calibrated to drive people into a frenzy of shopping, which is why flu shots are administered shortly before
Christmas. While Homer is trapped on the Island, he is replaced by a
doppelgänger who looks identical to him but speaks with a thick German accent and wears a dark tie.
Number Six, who is trapped on the Island for inventing the bottomless peanut bag, tells Homer about a makeshift boat he spent thirty-three years making, which Homer steals and escapes the Island with. When he gets home, Homer tries to contact the police through his computer, only for the computer to be hacked remotely by Number Two. Homer is attacked by his doppelgänger but then defeats him by kicking him in the crotch.
Marge and the kids are happy that the real Homer has returned, but then a fake
Santa's Little Helper spouts a gas that drugs the entire family. The episode ends with everyone in the family enjoying their strange, new life on the Island. A fake koala shoots gas towards the viewer while Homer and Lisa invite them to the Island. ==Production==