I am the most important person in Marnie's life, but she doesn't know that yet. I am the one who watches. Marnie Logan often feels like she is being observed. It's nothing she can pinpoint exactly - a breath on her neck or a shadow out of the corner of her eye - and now her life is frozen. Her husband Daniel has been missing for over a year. Depressed and increasingly desperate, she seeks the help of clinical psychologist Joe O'Loughlin. Joe is concerned about Marnie's reluctance to talk about the past, but then she discovers a book full of pictures, interviews with friends, former teachers, old loves, and colleagues that Daniel prepared for Marnie's birthday. It was meant to be a celebration of her life. But it is not the story anyone expected.