青少女安娜自出生以来就被父亲隔离起来抚养，他尽一切可能隐瞒她的身世。当一位女警官艾伦介入她的生活中，对她的生活背景展开调查后，安娜愈加发现自己对于森林的向往，同时挣扎着抵抗她体内不断增长的嗜血欲望。Anna spends her entire childhood under the care of a mysterious man she only knows as Daddy. He keeps her locked in an attic making her fear the Wildling, a child-eating monster that roams the outside. At age 16, Anna is freed by small-town sheriff Ellen Cooper who helps her start a new life as a normal teenager. But as Anna's body begins to blossom, her childhood nightmares return with a vengeance, leading to the conclusion of a terrifying secret.