The synopsis from IMDb describes it as this:
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...For those of you that know me, know that I worked at a haunted attraction here in Indianapolis for the better part of a decade, so THE HOUSES OCTOBER BUILT just felt like it was right up my alley. And it was.
I found this movie even more interesting considering that I also run a haunt review site.
Many of the scare actors in the film take their scares to the next level -- whether that be following the group to their RV, or isolating one guy while he takes a piss in the woods. Grounded in extreme reality, this film just keeps on delivering the goods, frame after frame.
The group eventually finds what they've been looking for, an underground haunt called "The Blue Skeleton" -- or, it finds them, actually. Things gets more real than they could have ever imagined.
The film is available now on VOD.