Olivia's life has shrunk to the size of her rehabilitation center—the same receptionist, the same therapist, the same grueling exercises twice a week for three years. She knows every crack in the waiting room floor, every faded motivational poster, every face that comes and goes through those doors. Until the day a new patient arrives, and something about the woman seems hauntingly familiar in a way Olivia can't quite place. The recognition, when it comes, will shatter everything she thought she knew about her marriage, her accident, and the life she's been fighting so hard to reclaim. Some thresholds, once crossed, change everything.