Horror Trailer Idea

The idea that was brought up by the group is that there is a supernatural necklace belonging to a dead girl. The girl does not want the necklace to be removed from the room which is situated in as this was her death place. the main protagonist is a female (final girl) who gets lost and stumbles across the place. her and her friends male + female find an open room and goes into the room to look for help, stumbling across the necklace and taking it. on their way out of this location, they wander into different rooms to see if they can find anything else of some value and one by one; everyone gets killed apart from the final girl.