When Colton, 17, is left at home for the summer to look after his little sister, he develops a crush on Heather, the pretty girl who moved into a mysterious old house across the street. He falls in love with her from afar, but he also sees her foster father become more and more dangerous to her. When Colton thinks the man is a member of a Satanic cult and is going to kill her in a ritual way, he takes desperate steps to stop him. He learns that the truth of the situation is more horrifying than he could have ever imagined.