Five years after an unexplained malfunction causes the death of 15 tour-goers and staff on the opening night of a Halloween haunted house tour, a documentary crew travels back to the scene of the tragedy to find out what really happened.

Five years after an unexplained malfunction causes the death of 15 tour-goers and staff on the opening night of a Halloween haunted house tour (Hell House), a documentary film crew visits the scene of the tragedy to investigate what really happened that night.

In 2009, a Halloween haunted house tour in the small town of Abaddon turned into a tragedy, leaving fifteen people dead. The circumstances surrounding the incident remain a chilling mystery to this day. Of course, locals and authorities blamed an unprecedented malfunction, but the truth may be darker than anyone imagines. To uncover the truth, a determined documentary crew delves into the secrets of the abandoned hotel, gathering testimonies, photographs, and chilling amateur footage. The team is unaware, however, that by piecing together the harrowing clues, they will soon confront the terror that still lingers within those walls. And when Sara, the sole survivor, emerges five years later to provide her raw footage, the crew must ask themselves: are they prepared to unravel the truth behind that fateful night?—Nick Riganas