在未来，全球成立了一个处理各类超常规、突发情况的超常规事件处置中（Supernormal event Processing,简称SEP），某天处置中心收到一组来自某山洞模糊的神秘广播信号，处置中心决定

A group of tired commuters have caught the last train home, ready to hop into their beds for the nig