Maeve Fitzgerald's life was turned upside down in an instant. Now she has quit her job as a police officer, sold her condo and left the city behind. She moves to a small town and buys a lonely old house by the sea. As she settles in, happy and content to start her new life, she gazes out of her bedroom window one quiet night and sees a little girl playing in her moonlit garden...alone. She soon realizes that she is no ordinary little girl...