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...

In the small town of Wallingham, the year is 2018. A ten-year high school reunion is planned but Wallingham has become a ghost town and big city developers close in with new project ambitions. What few people remain in town are thrill-seekers following ghost stories surrounding the town's abandoned high school. However, even they don't stick around once an old mascot costume of the Wallingham Warthog is unearthed and worn, activating an old curse that brings the mascot back to terrifying life. After the reunion planner' Sabrina has her event reservation canceled at the town's hotel due to the place going out of business, her old classmates Margo and Ronnie convince her to relocate the event at the town's old high school. What started out as a reasonably sound idea turns disastrous as the monster warthog storms through the halls and classrooms killing former students and teachers wherever it finds them. Trapped in a ghost town, with no help of any kind and with most of the old class ...

When a cursed new horror film is being made in their village, locals Les, Mike & Bob see their chance to cash in and get famous. As the local Detective Inspector and his hapless sergeant Haskins eventually trace a link in recent bloody mutilations to the film, the race is on to stop the killings before our local heroes get caught up in the real blood and guts.

To escape their marital problems, a young family travels from the city to spend the summer in Amish Country where a malevolent presence grips them. They soon discover that they were brought there for a reason and they must break free before the demonic hold consumes them.