He wasn't sure what that sound he heard was, but it didn't sound good. "I'm on my way." And he hung up.

He left the Prefect's dorms, and made his way toward the building she'd indicated. He didn't run, just strode quickly and determinedly toward her, once he'd spotted her. She didn't look good. He couldn't pinpoint any specific source. When he came up beside her, he still looked stern, but it wasn't his usual frown of disapproval of her existence. "What's the problem?"