The Last House on the Left (1972)

Two teenage girls, Mari Collingwood and Phyllis Stone, go to a rock concert. Trying to score some marijuana, they come across Junior Stillo who takes them back to his place. There they are made prisoner by Krug, Weasel Podowski and Sadie, a group of escaped and very dangerous convicts. In the woods, Krug and company humiliate, torture, rape and finally kill the two girls. Krug and company then seek refuge at the nearby home of Mari’s parents, saying that their car has broken down. But once the Collingwoods’ discover Krug and company are responsible for their daughter’s murder, they plan a horrible revenge.