When this year's round of unsuspecting Northerners fail to show up for their annual Guts N' Glory Jamboree, the residents of Pleasant Valley take their cannibalistic carnival on the road ...

In Ruggsville, Texas, the police under the command of Sheriff John Quincy Wydell attack the house of the sadistic serial killers Firefly family (a.k.a. The Devil's Reject) and they arrest mother Firefly, but Otis B. Driftwood and Baby Firefly escape from the siege. Tiny is wandering nearby the house and also escapes. Otis and Baby call their patriarch, the mad clown Captain Spaulding and they schedule to reunite at an isolated motel in the desert. When Otis and Baby arrive, they kidnap two families of singers, using sadism and violence against the harmless persons. Meanwhile, Sheriff Wydell promises to capture and kill the runaways, seeking revenge for the death of his brother, the Deputy George Wydell.