Macy and her boyfriend Chase travel into a remote wooded mountain area for a hike, where Chase intends to propose. While briefly separated, Chase encounters a large woman wearing a
porcelain doll mask as she buries a headless corpse, mourning over it. She attacks him with a shovel, shattering his leg and brutally mutilating his jaw before leaving him for dead. Meanwhile, Macy, searching for Chase, crosses paths with the masked woman and is pursued through the forest before being captured. Macy awakens inside a crib in a nursery within the woman's secluded house. She soon discovers that another man is being held captive in a neighboring room, who urges her to comply with the woman's "game" and search for a key. The masked woman, hereafter referred to as “Dolly,” forces her into disturbing, childlike
roleplay, subjecting her to humiliating and abusive treatment in an attempt to remake her into her baby. Elsewhere, Chase regains consciousness in the woods, gravely injured but still alive. Managing to escape briefly, Macy searches the house for a means of escape and discovers a key hidden in the basement, hanging from a doll whose head has been grotesquely replaced with that of a human, suggesting the fate of a previous victim. Dolly soon recaptures her and punishes her severely, mutilating her ear before later reattaching it after Macy submits to her control. Feigning compliance, Macy waits until Dolly falls asleep and uses the key to free the captive man. However, he reveals himself to be Dolly's father and holds Macy hostage to lure Dolly so he can escape. When Dolly confronts him, she violently kills him, tearing out his heart. Hearing Chase calling out to her from the woods, Macy escapes through a window and finds him, but Dolly intervenes and finishes killing him. In the ensuing struggle, Macy damages Dolly's mask, briefly revealing a charred face beneath. Using a shovel and the corpse of a previous victim to defend herself, Macy manages to subdue Dolly and flee. Macy encounters a park ranger, but Dolly suddenly reappears and decapitates him. Macy gets into the ranger's vehicle and runs Dolly over before driving away. As she flees, she places the engagement ring on her finger, laughing and crying hysterically in the aftermath of her ordeal. == Cast ==