I went into Room knowing nothing other than that a mother and son are stuck in a room. For some reason, I was under the incorrect impression that this was a sci-fi plot, derivative of a Twilight Zone episode I had seen years ago. I don’t think this counts as a spoiler, but Room is very much grounded in a terrifying reality. Told from the five-year-old Jack’s (Jacob Tremblay) perspective, Room tells the story of Jack and his mother, ‘Ma,’ aka Joy (Brie Larson), who are prisoners in a tiny tool shed. Joy had been kidnapped seven years earlier, at the age of seventeen.