Milla is never allowed to travel from the family farm to the village, and her only friend is her older brother, Niklas. When a bright-eyed girl named Iris comes to stay, Milla hopes they'll be friends. But the village is cursed by a demon who possesses girls at random, and the townspeople live in terror of who it will come for next. When the demon comes for Iris, she is captured and imprisoned with other possessed girls. Milla seeks to rescue her and break the curse forever. But she has a secret of her own: Milla is changing-- and may soon be a demon herself. -- adapted from jacket.