If you like court room drama movies then yes, its mainly about the prosecution of the Priest that performed the exorcism on her with scenes of her and how it all happened as the case goes on. - because she died, he was charged for neglet even tho her family and Emily agreed to the exorcism.
It has its moments of her in her devilish ways, and some freaky bits too
The movie gives the viewer two sides to the story - either she was just very mentality ill or she was possessed by demons: Yet i like what they said in one line - a mentality ill person thinks they are normal like everyone else where possessed ppl know theirs something wrong and seek help