故事发生在美国缅因州一个被冰雪覆盖的小镇上，由于多方的失误，导致小男孩欧文被遗忘在校车上一个晚上，正值严冬的小镇夜晚异常寒冷，欧文因身体温度过低，身体进入假死状态。校车司机和欧文一家的平静生活由此被打破。
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