Homer får vite at han har en halvbror, Herbert Powell. Han eier et bilselskap i Detroit og ønsker at Homer skal designe en bil for den vanlige mannen i gata.

Herbert Powell kommer tilbake og ønsker hjelp fra familien Simpson for å finansiere en oppfinnelse han har gjort.

A tornado touches down in Springfield which sucks up Santa's Little Helper. While Homer and Marge are out looking for the family dog, the tornado strikes again and almost takes Marge and Homer. Marge is distraught about the kids and decide to pick a guardian to care for the children.

Bart celebrates the most shocking birthday party of his entire life — one that might just change everyone in Springfield forever.