Sid Haig

After barely surviving a furious shootout with the police, Baby Firefly, Otis Driftwood and Captain Spaulding are behind bars. But pure evil cannot be contained. Teaming up with Otis’ half-brother Winslow, the demented Firefly clan escape to unleash a whole new wave of murder, madness and mayhem.

During a shootout in a saloon, Sheriff Hunt injures a suspicious stranger. The doctor's assistant, wife of the local foreman, tends to him in prison. That night, the town is attacked and they both disappear—only the arrow of a cannibal tribe is found. Hunt and a few of his men go in search of the prisoner and the foreman's wife.

The murderous, backwoods Firefly family take to the road to escape the vengeful Sheriff Wydell, who is not afraid of being as ruthless as his target.

Two teenage couples traveling across the backwoods of Texas searching for urban legends of serial killers end up as prisoners of a bizarre and sadistic backwater family of serial killers.