Beneath the fake blood and cheap masks of countless haunted house attractions across the country, there are whispers of truly terrifying alternatives. Looking to find an authentic, blood-curdling good fright for Halloween, five friends set off on a road trip in an RV to track down these underground Haunts. Just when their search seems to reach a dead end, strange and disturbing things start happening and it becomes clear that the Haunt has come to them...

一种致命病毒如野火燎原般在全球蔓延，整个世界处于封闭、封控、封锁状态，世界各地的城市里的人们生活在恐惧和混乱之中，他们在被迫的孤寂中苦苦挣扎，不惜一切代价为生存而斗争。。。