A struggling novelist, Xiao Ai, has her horror novel rejected by her publisher. When her publisher notifies her that her husband, Qi Kun, who was imprisoned on charge of domestic abuse, has been released from prison, Xiao Ai decides to pack things up and move alongside her asthmatic son, Xiao Xin to a remote mansion owned by her friend and Xiao Xin's doctor, Yinan. Xiao Ai finds several cut-out photos of a girl and her mother inside a wardrobe, while Xiao Xin discovers a rag doll outside the mansion and takes an instant liking to it. Xiao Ai feels that ever since her son took the doll, the girl who is presumably the owner of the doll terrorizes her and makes Xiao Xin acts unnatural, though he claims that the girl is afraid of her abusive mother. During one of her attempts to write a draft, Xiao Ai finds that a story has been written in her laptop, seemingly by no one, and which updates itself every day. The story matches the tale told by Xiao Xin: a girl who was abused by her mother after her father left them.