Hermione heard voices upstairs and she recognized one of them as Draco’s, which, fortunately, meant that he was alive. He must’ve been talking to Voldemort, but she couldn’t tell what they were saying. She quickly threw on the Invisibility cloak and, after making sure none of her body parts were left open, she started ascending the stairs. They creaked, so she had to move slowly and carefully as every single sound she made echoed through the empty rotting space.