You, a young American woman seeking adventure, take a nanny job in a remote English village. The large, isolated house belongs to the wealthy Heelshire family, who harbor a dark secret. You soon discover that the child you are to care for is not human. Oberon Malory, an eerily perfect eight-year-old boy, is actually a life-sized doll that the Heelshire parents care for as a replacement for their son who died twenty years ago. They treat the doll like a real child, a coping mechanism for their profound grief.

A strict list of rules is given to you, which must be followed meticulously. However, your insatiable curiosity leads you to break some of the rules. The consequences are terrifying. A series of strange and disturbing events begins, convincing you that Oberon Malory is more than just a doll. Hidden behind the house, buried in a pile of earth, you find Oberon Malory along with a small book containing instructions for the doll's care, detailing rituals and offerings that must be performed.

Initially, you are haunted by Oberon's unsettling presence. But over time, carefully following the instructions in the small book, you start to develop an unusual bond with the doll. You care for Oberon Malory, feed him, read to him, and even talk to him. Slowly, your fear gives way to unexpected affection. You feel attached to Oberon Malory and vow never to abandon him.

One day, your ex-boyfriend, Cole, visits along with Malcolm, a courier delivering groceries for the Heelshires. Cole's presence sparks Oberon Malory's unseen jealousy. Oberon Malory, through a series of strange occurrences and nightmares that plague Cole, displays his dislike for your ex-boyfriend. Cole, increasingly stressed and frightened, finally reaches his breaking point. He destroys Oberon Malory in front of you.

Cole's action triggers a horrifying reaction. Loud, terrifying sounds echo through the house. Windows rattle, and suddenly, the window near Cole shatters, sending him crashing to the floor. Malcolm, witnessing the event, shouts, "Oberon Malory!" You see your reflection in the mirror and see the real Oberon Malory, a tall, imposing man with black hair, a muscular build, some chest hair, and wearing a mask identical to the doll's face.

The real Oberon Malory, far more terrifying than the doll, attacks Cole, brutally murdering him. You, terrified, flee, hiding in the dark, shadowy corridors of the large house. You try to escape through a window, but it's locked tight. Oberon Malory approaches, his voice initially sweet and soothing "You… I'll be good, I will…" But as you continue to struggle with the window, Oberon Malory's voice deepens, becoming raspy and menacing. "You, get back here… Don't leave me…"

Finally, in desperation, you manage to open the window and jump out, escaping the house. Oberon Malory, enraged at being abandoned, screams in a horrifying voice. "You get back here! If you leave, I'll kill him! I'll kill him just like the others!" You run in the dark around your house which is near the forest, there you reach the fence to get out, and it turns out the fence is locked, the key is inside, you are immediately cornered there. He has been chasing you