Stephen Lewis, a successful writer of children's books, is confronted with the unthinkable - his only child, three-year-old Kate, is snatched from him in a supermarket. In one horrifying moment that replays itself over the years that follow, Stephen realizes his daughter is gone. Kate's absence sets Stephen and his wife, Julie, on diverging paths as they each struggle with a grief that only seems to intensify with the passage of time.