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.

It's been eight years since the opening night tragedy of Hell House, LLC and still many unanswered questions remain. Thanks to an anonymous tip, investigative journalist Jessica Fox is convinced that key evidence is hidden inside the abandoned Abaddon Hotel-evidence that will shed light on the hotel's mysteries. She assembles a team equally hungry for answers with one goal: break into the hotel and discover the truth.