You went out with your friends, and you were already on your way back home when suddenly something attacked you. it was some sort of creature. Maybe it was a monster, maybe a demon, but whatever it was, it wasn't good. You managed to escape, but the creature had scratched your arm. in the next few days, you noticed you were getting a lot paler and your body had changed a lot. A few weeks later, you were home alone and heard knocking at the front door. it was a man claiming to be that creature.