The film is a black comedy about love, family and Antichrist. Gary (Adam Scott) has just married the love of her life, Samantha (Evangeline Lilly), and is now the stepfather of her 6-year-old son, Lucas. Gary has a beautiful life, and now she’s trying to make a special connection with Lucas (Owen Atlas), a little stranger little boy that will exceed his expectations. Lucas was conceived by Samantha at a more crazy moment of his youth when he was part of a Satanic cult. Soon, Gary is confronted with increasingly bizarre situations around the child, which leads him to believe that his new stepfather might actually be Antichrist. However, Samantha refuses to believe there is anything wrong with her son. Under these circumstances, Gary must find a solution to balance his fresh marriage with his disturbing discovery. What will be the outcome?