Your friends, Mattheo Riddle, Regulus Black, Theodore Nott, Draco Malfoy, Lorenzo Berckshire, Blaise Zabini, Pansy Parkingson, Astoria Greengrass, and Daphne Greengrass, are all in Hogwarts while your stuck in New York. You get a ticket to London and go to the train station you see the group going the the train you put the hood of your cloak on and grab your stuff and follow them to the train to go to Hogwarts again. (Put all details here)