Two years after escaping from demonic terror, a young woman is still haunted by unnatural visions.
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.
Seven years after the controversial Abaddon Incident in Hell House LLC (2015), people still wonder whether it was real or an elaborate hoax. So, to shed light on the horrifying case once and for all, an investigative reporter is willing to test a dangerous theory. After all, the police have not solved a series of disappearances since the Halloween haunted house attraction opened. But they say curiosity killed the cat. And as her team dives headlong into the dark mysteries of the abandoned hotel, history repeats itself. Only this time, the intruders' souls are on the line.—Nick Riganas
The film begins with Wendy Mallet recounting her tragedy when her son, Jackson Mallet, broke into the abandoned Abaddon Hotel and never came out more than a year ago. A video is shown in which Jackson runs frantically around the hotel begging for help before having a mental breakdown. A cult follower is seen slowly approaching him.
On October 6, 2017, Suzy McCombs is presenting a Hell House LLC special program, with Arnold Tasselman, Mitchell Cavanaugh (Diane Graves' coworker from the first film) and Brock Davies as guests. They start discussing the veracity of the Hell House documentary. Arnold points out that he tried to take down Mitchell's documentary, arguing that it is a hoax that is causing damage to the town's reputation, while Mitchell reiterates that Diane and her cameraman died inside the hotel, and it is not a safe place to go. A journalism team from an online blog is watching the program. Its presenter, Jessica Fox, claims that with the help of Mitchell they can break into the Abaddon in hopes of a spike of popularity for their website.
They meet with Mitchell outside the Abaddon hotel, who says that breaking in will not be easy as the police is patrolling around the hotel to prevent any more disappearances, such as the one of a teenager who broke into the hotel and disappeared while live streaming his adventure. On another video, a couple picks up a strange woman asking to be dropped off at the hotel, only to be revealed as the ghost of one of the tour-goers that died in the haunted attraction back in 2009.
Four days after their break-in, a distressed Jessica Fox is questioned by the Rockland County police. She cannot remember what happened and has a panic attack.
Mitchell, Jessica, Molly and David intend to break in, joined by Brock Davies and his cameraman Malcolm to investigate the hotel in a paranormal style. However, Molly cannot bring herself to enter and stays outside. Mitchell, Jessica and David head for the basement, while Brock and his cameraman go into the dining room where Andrew Tully, the hotel owner, committed suicide along with several cult followers of his satanic cult. When they try to communicate with Tully via a Ouija board, they see the ghost of a woman.
Molly enters the hotel at David's request. The group finds out that Alex from the original Hell House team went to the Abaddon in April 2009, way before the Hell House disaster. He is seen making a deal with an unseen man. When the group reunites with Molly and find out that David never asked her for help, they try to leave, only to be trapped inside. They begin to experience paranormal events including the ghost of Melissa, a Hell House actress that died in 2009, and the hanged bodies of Brock and his cameraman. They are then captured and sent to the dining room.
Back at the Morning Mysteries show, Mitchell claims that the hotel lures people inside in order to kill them and trap their souls there. Once the show ends, a crew member tells Suzy that Arnold Tasselman called to apologize as he could not make it to the interview. Suzy is shocked as "Tasselman" has just left after the show.
At the hotel, when Mitchell wakes up, he finds Jessica and Molly tied up, along with the ghostly figures of Mac and Alex, two of the original Hell House staff. Tully himself shows up, taunting Mitchell about how he lured him into the hotel despite Mitchell saying he would never enter it, revealing that "Tasselman" was Tully all along. Then, he sees the ghost of Diane playing the piano. Tully tells him that, in order for the dominoes to keep falling, he must choose one of them to walk out of the hotel to lure more people into it. Molly gets killed and Mitchell, having a breakdown, gets up. Jessica cries desperately for help.
In the present, Jessica is in the police station. When the officer questioning her turns around, it is revealed that she died inside the Abaddon as well, as we can see her ghost staring at the camera.
