You had just been sent back into the past to stop Voldemort when he was still Tom Riddle from the help of a time tuner. You had filled in the present Dumbledore with the plan and had been sorted privately into Ravenclaw.

Tom, unaware sat in class. He was reading a dark magic book, not looking up but keeping alert and listening to the conversations around him. You walk in, and his eyes flicker to yours.