Nicole, forty-one years old, is a pharmacist with a husband and two teenage kids, who is at a point in her life when she is asking if "this is it," or whether there's something more. One day she gets a letter from an anonymous Observer who knows her daily habits, and her potential, intimately. He has a plan for her, if she is interested. The letter contains a green card that she should place in her window, if she wishes to pursue the mysterious relationship. If not, she should throw the letter away, and she will never hear from the Observer again. After a few days of internal debate, she puts the card in the window and begins a long relationship with the elusive Observer, who puts her on a program that starts by changing her life, but ultimately threatens everything that has meaning for her.