The next day, Bing Huan brought Hermione to an empty classroom, where Snape had been waiting for them.
"Tell me, when did you come up with yesterday's plan?"
Bing Huan leaned against a desk. "The idea started taking shape after I owed you a favor last term. More specifically, Harry told me you were giving Professor Lupin his potion and had discovered that he was a Werewolf."
Snape eyed Bing Huan suspiciously. "As far as I know, you and Ron only had a huge fight the night before last."
"It was just a misunderstanding with Ron. We cleared it up." Bing Huan waved a hand. "Besides, I was the one who asked Harry to call you."
The previous night, everyone else had gone to bed, but Harry was still holding up his wand and studying the Marauder's Map. He watched with interest as the little dots moved around Hogwarts in the middle of the night.
Dumbledore, Grindelwald, Snape, McGonagall, Peter Pettigrew...
Wait!
Harry shifted his gaze back. The black dot representing Peter was pacing back and forth along a corridor. Harry hurriedly shook Ron awake, then, after a moment's thought, went to wake Bing Huan too.
"Harry, ever since I met you, I haven't had more than a few decent nights' sleep." Ron rubbed his eyes as he stumbled over.
"You've got to come look at this!"
"Bloody hell! I'm not seeing things, am I? He's supposed to be dead. Sirius blew him to pieces!"
Harry looked at Bing Huan in confusion. "You seem like you already knew, Huan."
"I wouldn't say I knew for sure. But when I heard about it back then, I had someone look into it, and there were definitely some suspicious details."
Bing Huan told Harry and Ron about how Sirius didn't fit in with