those were the days

"When Katie opens her eyes, it's to a strange necklace and to a stranger boy." Tom Riddle may not be a terrorist but he is a threat as the advisory to the Minister. Sirius Black still runs away from home at sixteen. Regulus Black is seen with three different people in a day, and one of them is always Bartemius Crouch Jr but never his brother. Slughorn brews a potion. No one knows