I am going to be honest, because I hope you want that. Your story seems like a synopsis rather than the story itself. I feel at a distance from the characters, when I should be feeling fear for Katrine, I should have some interest in her fate. But I have no connection with her, other than a feeling she's a bit naive or stupid. I don't particularly identify with people who, in this day and age, would let a strange unidentified come into their house, so you really need to bring some emotional ties. You might, for example, do something as simple as have her boyfriend call her and say, "A friend of mine is coming by to pick up a dvd. Would you mind giving it to him, hon?" That way, when the guy arrives, she has a reason to believe he belongs there and then grow suspense as she realizes that this isn't a friend. As it sits, it just a description of violence and I don't enjoy reading violence for the sake of violence (I may be in the minority about that). That may or may not be what you have in mind...I'm just missing the purpose of the story...the reason why I should keep reading. I can't say much beyond that. I realize this a rough draft so I hope that as you refine the story, you do spell checks and make sure there are appropriate paragraph breaks. I rarely get a story right the first time, so don't feel as if I'm being too hard on you. It just seems to me the story is a little empty....but someone else could react very differently. No matter what I or anyone else says, only you know what you are trying to accomplish with the story. There is too little here for me to get a sense of where you are going with it. Good luck. And I hope some other people join in with their comments.