Strange Attractors

In which Hermione falls down a rabbit hole—she wakes up with no idea of what happened or how she got there. Also, why does it have to be Hogwarts again? If this is a prank by another Unspeakable, she'd pay it back seven-fold once she got back. Yet it's never that simple. Now, she's stuck in a Hogwarts that's not her own, and Hermione was never one to just walk away from trouble.