"Phantom" A Phantom Of The Opera AU

Phantom of the opera is not my story, this version is a fan-made au.

Ever since Leon had been taken in by the theatre, he always had this little voice in his head directing him and guiding him. Convinced it was the voice of his father, a famous musician, he followed without hesitation. One day, poltergeist activity starts up and frightens everyone. Things are being thrown, torn down, people are being possessed, and even worse, getting killed by supernatural forces.
Called to the scene, Minister Michael goes to investigate and discovers his childhood friend and love is the star. Activity continues as Michael investigates and Leon is the only one so far uneffected. Suspicion raises and old emotions come to the surface as they work together to stop disaster from striking.
Michael has a feeling Leon is involved, his actions and words are eerily coincidental to every happening. Can Michael stop the phantom ghost from burning down Paris? And does he have to sacrifice Leon to do it?