介绍：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...

介绍：2010年7月，圣贝纳迪诺县当局遇到了一起极为离奇的案件。警方在接到一位朋友的报警后赶到受害者家中，发现的谋杀案令人震惊。现场带有仪式性的痕迹，其中一名探员很快认出了天花板上用受害者血液画的符号，这个符号与1995年他们曾追捕的一名连环杀手有关，而该杀手似乎在消失了15年后再次出现