 In Halloween, the student of theater Jenna Whooly returns to Bell Island to spend the holiday with her family and her boyfriend Alex Martin, who studies in the same class and was also raised in the island. Her young brother Douglas "Dougie" Whooly, who is very attached to Jenna and is fascinated in the videogame Satan s Little Helper, becomes jealous with the presence of Alex. He leaves home wearing his costume of Satan s little helper seeking Satan on the streets to kill Alex. Dougie meets a serial-killer that coincidently is wearing a costume of Satan and proposes him to attack Alex. He brings the insane murderer home, and Jenna and her mother Merrill Whooly believes that the masked killer is Alex acting like Satan to please Dougie. Later the boy walks with the criminal along the streets helping him to kill the locals.