When the residents of a small town discover that their local mortician has been dumping the corpses of their loved ones into a swamp, rather than properly cremating them, they seek the assistance of a witch named Haggis to mete out justice. Haggis summons the demon Pumpkinhead to kill those responsible for the desecration. The only thing that can stop Pumpkinhead is an eccentric, small-town physician with an illegal donor business who is set on killing the townspeople who have unleashed the demon.