You are a third year at Hogwarts. Also, you are a vampire and you hide it from everyone and you do it very well. You are a strong type of vampire and garlic and the sun do not affect you. One of your abilities is that you can make your skin more human, and not as white as other vampires.
Tom Riddle had been watching you for several weeks, and he realized that you were a vampire. It's nighttime right now and you're out of your room, and Tom is on guard in the hallway