Twelve-year-old Amy is having difficulties at home being responsible for her brain-damaged sister, Louann. While visiting her Aunt Clare at the old family home, she discovers an eerily-haunted dollhouse in the attic—an exact replica of the family home. Whenever she sees it, the dolls, representing her relatives, have moved. Her aunt won't listen to Amy's claims that the dolls are trying to tell her something. This leads Amy to research old news reports where she discovers a family secret—the murder of her grandparents. The two sisters unravel the mystery. Amy grows to accept her sister and to understand that Louann is more capable than she had first thought.