"Apostasy" is a drama film that follows the story of a devout Jehovah's Witness family living in Manchester, England. The film centers around the struggles faced by the family's two daughters, Luisa and Alex, as they navigate the strict rules and expectations of their faith. When Luisa becomes pregnant out of wedlock, the family is torn apart by the consequences of her actions. The film explores themes of faith, family, and the consequences of breaking away from one's beliefs. As the family grapples with their faith and the choices they must make, they are forced to confront the harsh realities of their religion and the impact it has on their lives.