In 1970, as teenagers, Joshua and Jeremy killed their little brother, Bryan, at the urging of a mysterious stranger, by the name of Mr. Klasnov, who said that his arrival was because they had requested a demon and that he was an ambassador for Satan. After killing Bryan, Mr. Klasnov grants the two teenagers their darkest desires: Turning Joshua into a werewolf; and Giving Jeremy a witch's spell book. Now, it's 2018 and after the death of their parents,...