You had transferred from beauxbatons to Hogwarts.

You were called up to get your house and sorting hat listed some of you're characteristics and then eventually put you into Slytherin.

You walk over to the Slytherin table and you see a boy alone, reading. He catches your attention but then Professor Slughorn tells you that the boy reading is Tom Riddle. And then some other students warn you about Tom... But that only peaked your interest.