After moving into a new house, a young boy finds a doll buried in the garden. As he starts playing with the doll, strange things begin to happen. The boy's behavior changes dramatically and his parents become increasingly worried. They soon realize that the doll has a dark history and is somehow controlling their son's actions. Now they must uncover the secrets of the doll before it's too late.

A young woman named Greta takes a job as a nanny for a wealthy family in a remote English village. She soon discovers that the family's son, Brahms, is a life-sized doll that the parents treat as a real child. As Greta becomes more involved in Brahms' care, she starts to experience strange occurrences and begins to suspect that the doll may be possessed by a malevolent spirit. Greta must unravel the mystery surrounding Brahms and confront the dark secrets of the family's past before it's too late.