Homer is the last FAT man. 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.