女孩乔伊（布丽·拉尔森 Brie Larson 饰）被一个叫“老尼克”的男人拐骗，之后被他囚禁在其房子后院的棚屋里长达七年之久。在此期间她遭到强奸，并生下儿子杰克（雅各布·特伦布莱 Jacob Tremblay 饰）。靠着老尼克时不时的物资补给，母子二人艰难度日。尽管如此，母亲还是竭尽所能，为儿子杰克创造了一个安全而开心的成长空间。这个狭小逼仄的房间，成了杰克生活成长的神奇小天地。在杰克度过了他的五岁生日后，母亲决定告诉他真相，在这个小小的房间外面，有着更广阔的世界。他们开始策划逃跑计划，决心要逃出这个囚禁他们的房间…… 本片根据艾玛·唐纳修的同名小说改编。
Plot Summary:ROOM tells the extraordinary story of Jack, a spirited 5-year-old who is looked after by his loving and devoted mother. Like any good mother, Ma dedicates herself to keeping Jack happy and safe, nurturing him with warmth and love and doing typical things like playing games and telling stories. Their life, however, is anything but typical--they are trapped--confined to a 10-by-10-foot space that Ma has euphemistically named Room. Ma has created a whole universe for Jack within Room, and she will stop at nothing to ensure that, even in this treacherous environment, Jack is able to live a complete and fulfilling life. But as Jack's curiosity about their situation grows, and Ma's resilience reaches its breaking point, they enact a risky plan to escape, ultimately bringing them face-to-face with what may turn out to be the scariest thing yet: the real world.
