When someone knocks on your door, the question is, who can it be? Does he come? But on HALLOWEEN's night there is only one question. And she only has one chance to give the right answer: Trick or treat?

Thomas, a forensic scientist consumed by the darkness of his profession, sees his faith in God crumble. When he receives an eviction notice, he is forced to move his family to his great-grandfather's farm, where several crimes have already occurred. His daughter, Melissa, is possessed by a legion of demons, sparking a struggle between heaven and hell for her life.