En route to visit their grandfather's grave (which has apparently been ritualistically desecrated), five teenagers drive past a slaughterhouse, pick up (and quickly drop) a sinister hitch-hiker, eat some delicious home-cured meat at a roadside gas station, before ending up at the old family home... where they're plunged into a never-ending nightmare as they meet a family of cannibals who more than make up in power tools what they lack in social skills...

Upon hearing that vandals have desecrated a graveyard where her grandfather is buried, Sally recruits her boyfriend Jerry, her brother Franklyn, and her friends Pam and Kirk to investigate. On a side trip to the grandfather's deserted farm, the travellers pick up a slimy hitchhiker who cuts himself and slashes Franklyn. After arriving at the farm, Pam and Kirk search for an old swimming hole--Kirk hears a generator and believes he can find some gasoline. He enters the house hoping to find the owner. Unfortunately, this is the home of the hitchhiker, as well as Leatherface, who has some surprises for the travellers consisting of sledgehammers, chainsaws, and assorted cutlery.

Sally Hardesty and her wheelchaired brother Franklin along with three friends travel to a cemetery where there have been grave robbings.To continue their trip, they pick a hitchhike. The hitchhiker turns out to be crazy so they drop him off and proceed with the trip. They go to visit an old house where Sally and Franklin used to live. One follows a trail from the back of the house and that's when it all begins.