In a slaughterhouse in Texas, an obese female worker was cutting meat on a chopping board when she suddenly felt a sharp pain in her abdomen. It turned out that her amniotic fluid had broken and she gave birth to a deformed baby, who was abandoned in a trash can and later rescued by a cleaner. N years later, a group of young people drove by here. Eric (Matthew Bomer), who had just returned from the Vietnam front, had just reunited with his fiancée Chrissy (Jordana Brewster) when he learned that his younger brother Dean (Taylor Handley) was going to the front again. He wanted to accompany his brother to the battlefield. But Dean was persuaded by his girlfriend Bailey (Diora Baird) to burn his enlistment certificate, and they had a dispute over this. At this time, they were provoked by a car racing gang. Later, the girl in charge was shot dead by the police. Policeman Hoyt (R. Lee Ermey) stopped their car and took them to a horrifying slaughterhouse, where they began their inhumane torture...