A year after the death of her husband, Blythe Wyndham moves with her four-year-old daughter, Maddie, back to the small town where she grew up. But soon after they move in to their new home, strange things begin to happen. Maddie has disturbingly intense nightmares--so intense that Blythe fears one night she may not be able to awaken her daughter. A psychologist explains that Maddie's dreams are simply the result of her father's death, but Blythe knows something else is wrong. Because she's also heard the ghostly tapping at her daughter's window.