Chris visits his girlfriend's family for the weekend and finds out that through a combination of the mom's hypno-therapy and dad's neurosurgery, the family is transplanting the brains of old white people into the bodies of young black people. His girlfriend Rose is in on it too by seducing the young people to bring them to her parents to auction off to the highest bidder.
The help on the property is revealed to be subjects of transplanted brain's of the father.
Chris kills the mother, father and brother. The body with the grandfather's brain turns back briefly, long enough to kill Rose and then himself.
Chris is able to escape the area with the help of his best friend Rod.