In a remote village in England, a young nanny named Greta accepts the job of taking care of a strange child who, surprisingly, is not human. Upon arriving at the old mansion, she discovers that the "child" is actually an elaborate ceramic figure, resembling a small and unsettling-looking boy. However, the homeowners, an elderly couple, explain that they must adhere to a rigid set of rules and rituals to care for their “son.” At first, Greta takes this strange assignment as just another family eccentricity, but as the night progresses, she begins to experience disturbing incidents that make her question her mental health.
Trapped in the mansion, the situation becomes increasingly chilling. The rules given to her by the family seem to serve a darker purpose than she initially thought. As Greta tries to adapt to her new life, she starts to encounter strange occurrences: whispers, inexplicable movements, and a growing feeling of being watched. The tension escalates when she uncovers disturbing secrets about the family's past and the true reason why the "child" is so important to them.
As she unravels the mystery behind this macabre dynamic, Greta faces a battle of wits and cunning against supernatural forces. The real question is whether she will be able to escape the mansion before she becomes just another victim of a much more sinister game.