A brother and sister set out from California to Florida in there fathers car to deliver it for him. Meanwhile, the police have found bodies buried in the ground covered in toxic waste, from the Original Family from TCM 1 and 2. The brother and sister stop at a gas station and are threatened by a crazy man with a shotgun. They take a road they were told of at the gas station but are hunted by Leatherface and his family. There only hope is a Survivalist with a lot of firepower.