It's been ten months since Anna last left her home, lost in memories and terrified to step outside. Anna's lifeline to the real world is her window, where she watches her neighbours. A picture-perfect family, they are an echo of the life that was once hers. But one evening, Anna witnesses something horrifying. Now she must uncover the truth about what really happened. But if she does, will anyone believe her? And can she even trust herself? Starring Amy Adams, Gary Oldman and Julianne Moore.