Power of Harmony

Twilight gasped, right in front of her was a purple force-field, in it were countless books, all piled up on top of each other.  In the middle of it all was a dark purple Unicorn sitting on a chair, reading one of the books. The Unicorn looked up from the book to stare at Twilight, her face turning into a smile, she put the book down and walked to the force-field.

Twilight was feeling scared about, she had no idea who this was, but she wanted out.  But something, or someone, was compelling her to stay.

The dark purple Unicorn chuckled at Twilight's expression.

"So we finally meet Twilight, in person," the dark mare said.

Twilight instantly recognized the voice, her mouth open, but no sound came out for what seemed like hours, but she was finally able to say something.

"Dawn?  Is that you?"

The mare chuckled and gave an amused look at Twilight.

"Yes, it is I, Dawn," Dawn said, she then looked around the room.

"And this, is my prison."