Filmed at the Danvers State Insane Asylum in Danvers, Massachusetts, Session 9 follows a cleaning crew who are hired to remove asbestos from the abandoned facility. The building's long and dark history appears to be returning and has its sights set on them as tensions slowly build through discoveries made by the team. Found recorded therapy sessions of a girl with multiple personalities who killed her family and a trail of coins leading to personal belongings of deceased patients in a decaying wall set a dark and uncomfortable backdrop for what else will be discovered.
With only a week to finish the job, the stress has everyone on edge, especially Gordon, the owner, who is struggling to keep his business afloat and has personal issues at home that exacerbates and heightens his emotions. He hears voices in his head and we are shown flashbacks of his wife and infant daughter alluding to an unfortunate outcome. Additionally, one of the crew has gone missing in a questionable and mysterious way which only acts to drive the trust between everyone further and further apart.
As we see Gordon spiral further out of control and the bodies of the crew start to pile up, it is revealed that he is the one responsible for all the death and carnage and has been obeying the voices in his head which has been aligned with the aforementioned therapy session tapes in that between the voices in their heads and split personalities, the body lets the evil take over and give into their most sinister urges.
~TJ