Five haunted-house enthusiast friends are still trying to recover from the trauma of being kidnapped the previous Halloween by the Blue Skeleton — a group who takes “extreme haunt” to another level. They decide to face their fears in order to move on and go back out on the road to find more haunted houses. However, ominous signs of the Blue Skeleton start appearing again…

　　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。。。

　　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...