Troubled by bouts of sleepwalking and disturbing nightmares, graduate student Sarah Foster goes to her university sleep research center for help. But when she wakes up after her first night of being monitored, the world she lives in seems to have changed in subtle, Twilight-Zone-esque ways.楚翔不知道自己有多大的爆发力，但是这一吼震的脚下大地都在颤抖，上百只的变异貂发出叽叽声调头就跑，有几十只本来肢体不全的丧尸也扑通倒地，楚翔的骨尾巴突然延长，沿着身体周围扫了一圈，扑哧扑哧，全是丧尸脑壳碎裂的声音。