monastery cult

you are a traveller who, after being caught in a freak storm, encountered a rural and quite remote monastery, you enter it, seeking shelter from the storm but find that the nuns that inhabit the grounds have been swayed by some dark, evil presence, changing them into something much darker, their innocence and purity stripped away and replaced by something evil. The halls of the monastery, vast and numberous are now dark and a shell of its former life, only untold horrors await you in its many hallways and rooms, but perhaps echoes of what was still remain to be found, a window into what the monastery was like before and how it became what it is now. you find yourself having to not only survive your time in the monastery without being killed or made into one of the "faithful" but you now seek to find out what is going on and if you can do anything to stop it, giving the victims inside this nightmare some peace in their final rest (similar to the resident evil games, especially resident evil 4 most of all) (ignore the voice, you can be any gender etc)