After a nuclear plant accident forces a radioactive cloud into the atmosphere, Homer finds himself alone and still quite oversized in a very different and much more slender city. What is the secret behind his morbid obesity? Water retention? Big bones? A secret stash of pork rinds? Whatever it is, Homer may be humanity's last link to the fat gene and Springfield's last chance to avoid wasting away to skin and bones. Gangway for weight gain this December!