Sam carefully made her way down the passage, her left hand constantly in contact with the wall beside her, despite the odd residue there in places. She'd been reliably told in the past it was a way to stay on the same path, and it'd become a habit whenever she explored anywhere new.

She only became more curious as she took more turns, the passage remarkably...well, consistent. She'd expected it to have either been blocked or opened out into something long before now. Where exactly in the castle was she? She didn't think she'd gone any deeper underground, but maybe she had. The Slytherin Common Room was meant to be under the Lake, right?

And then she heard voices. Two, a male and a female...and they were getting closer. "Hello?" she called out. "Anyone there?"