Daniel Price has just had the breakthrough of his life when his novel cracks the best seller list. He and his wife, Nicole, decide to move into the majestic Nightingale House on the shores of Willow Lake, in the town of Kingsbrook, Maine. But Daniel's world is shattered when Nicole is killed in a car crash, and he must raise their eight year-old daughter, Caitlyn, on his own. Daniel and Caitlyn move into the Nightingale House to begin their new lives, but everything is not as it seems. Daniel is haunted by horrible nightmares and strange sounds, and Caitlyn is obsessed with an imaginary friend that only she can see. Daniel realizes that there is a menacing presence lurking in the house... and it won't stop until it has Caitlyn. To save his daughter, Daniel has to solve a hundred year-old mystery, because time is running out, and the whispers coming from within the walls of the house are growing louder...