Every spring, fast food junkie Peter Martin packs his wife, Mary, and son, John, into his SUV and crisscrosses the back country of the Florida Panhandle searching for Diddy-Wah-Diddy, a legendary town offering travelers all the free food they can eat. Mary thinks they'll never find it. John draws maps to show where they've been in years past. Peter has more hunches than fleas on a hound dog about the town's location. More often than not, they get lost.

This year, they find Diddy-Wah-Diddy. It's better than they expected. They begin to eat more than they should. Then Peter has a horrifying accident and disappears. While the powers that be treat Peter's fall from grace as business as usual, Mary and John wait for him, and while they wait they keep eating all they can eat.