My Practical Production Thriller/ Horror First Idea

I think that my sequence should start with a few seconds of darkness, but some noises in the background, then you hear a noise of  somebody lighting a candle and then a long shot and close-ups of the flat of circa thirty years old man. The music should be sinister and mysterious. It will be dark and there would not be very much in the room/flat (no furniture except from a table and a chair).
You can see on every wall pictures of a beautiful teenage girl. There is just one empty spot on the wall which is meant to be for the last pictures of the girl. Then he goes to another room, in his basement, which is very small and there you can see how he prepares a coffin or just a really small box in which you can see an old porcelain doll, you can also notice (close ups) some chains and a knife outside the box/coffin. The light is very spare and it the room is really dark. Nobody would be able to hear her screaming (his flat is in the middle of the nowhere like in Scream?).
Then he goes out and takes the last pictures of her. He knows that she takes out her dog every evening in the woods. The dog runs away and she goes after him and in the same time, the man comes from behind and shuts her mouth, the sequence ends like that (fading sound and then darkness or a sudden cut?). There could also be cross-cutting between her going out with the dog and him cutting the photos in order to gain time.