Years ago, Isabella Rossi called 9/11 claiming to have killed three people. Years later, her daughter is trying to document her story. The Vatican has kept her mother (who was found not guilty on the grounds of insanity) in an Italian mental hospital.
The film presents itself as this serious attempt by a daughter to get to the truth of what happened to her mother. There are all the standard possession tropes as the movie goes along, though it tends to not be all that compelling.
But honestly? The biggest insult to the viewer? The film just stops cold and then tells you to visit a website for more information. It feels like they were going to try and make this the Blair Witch 2.0 with a viral marketing campaign. But it just annoys and gave me no desire to visit the website.