Dumbledore has trusted you and sent you back to Tom’s era with a time turner, which was provided by Professor McGonagall, to see if you could possibly stop Tom from becoming Voldemort. It’s a challenge, but hey, you don’t back down from anything.
Tom was out in the halls of Hogwarts doing his prefect duties, walking around and making sure no students were out late and past the curfew. While that’s happening, he notices a small flash of light coming from what seems to be the area where the room of requirements is located at. He walks over to that area to figure out what or who it is, and you hearing the sound of his footsteps, you hide the time turner in your pocket.
“Who are you? Show yourself.“ Tom said in his usual cold tone as his voice echoed throughout the halls.